Mulch: 12 different types and their uses | The Best Gardening

Mulches: Types and Uses

Mulches are used as a soil covering, for a variety of reasons:

  • Water preservation (moisture retention)
  • Heat trapping
  • Create pathways
  • Weed prevention and control
  • Protecting roots from fluctuating and extreme temperatures, and…
  • To help control soil erosion

Different mulches have different functions and uses.  Here we’ll consider the different functions of several mulches:

  • Pebble mulch/Gravel
  • Rock mulch (medium to large stones)
  • Pumice rock mulch
  • Straw mulch
  • Newspaper and Cardboard
  • Grass clippings
  • Compost as a mulch
  • Landscape fabric
  • Wood chips, Shredded bark, and Sawdust
  • Cocoa hull mulch
  • Pine straw

If you’ve got a bare patch of soil, get some mulch on it.  The soil should never be left uncovered.  The ground is never left uncovered in nature, and it shouldn’t be left uncovered in a garden or orchard.  Why?  Read this article here.

For any kind of vegetable garden, we would recommend wood chip mulch far above any other mulch.  Just don’t go digging it into your garden.  Mulches stay on TOP of the soil, for good reason.  (In fact, the definition of a mulch is basically anything that covers the soil.)  Well-composted organic matter that is 100% broken down can be dug into your soil, but not mulches.  Why?  The problem has to do with nitrogen.  Nitrogen is necessary for your plants, and it’s also necessary for the organisms that break down the organic matter, whether they’re working on stuff in a pile of compost or mulch that’s sitting on top of your soil.  During that breakdown process, the bacteria will sequester nitrogen where they’re working on the organic matter.

So on the surface of your soil, where the mulch is in contact with your soil, there will be almost no nitrogen available to your plants.  That’s okay, though, because your plants send their roots several inches into the soil and they’ll find what they need there.  But if you’ve tilled the mulch into your soil (and of course we’re talking mulches made out of organic matter here, not rock or pebble mulches) the bacteria and other organisms will sequester nitrogen wherever that mulch is in contact with the soil, even if that’s several inches deep, and your plants’ roots won’t be able to pull any of the nitrogen from the soil, and your plants will become very deficient in nitrogen.

Just remember – if it’s well-composted organic matter, you can work it into your soil.  If it’s not, keep it on top for all the amazing benefits mulch brings to the garden.

Okay, now for the mulches.  There are lots of types, each with its own functions and uses.

1. Pebble mulch is mostly useful on pathways or driveways.  Pebble mulch/ gravel allows water to drain through, which cement and asphalt don’t do.  However, the little pebbles/gravel are easily pushed out of their intended area, if they are not confined within a trenched structure.  This can cause a big problem over time if you need to mow along the edges of your driveway or pathways.

800px-Parterre2Little pebbles will cause dings and nicks in your mower blade, causing it to become dull much more quickly; and flying pebbels/gravel can cause injury.  However, if the gravel is contained (see picture above left), it’s fairly easy to use a wide leaf rake to pull most of the gravel back into its place from time to time.  Gravel and pebble mulch also absorb some heat from the sun during the day, and give it off at night, creating a mini micro-climate which can be useful.

 

2. Rock mulch is sometimes used in perennial flower beds or other perennial plantings.  Large rocks absorb even more heat from the sun during the day, creating the potential for larger warm micro-climate areas than small pebbles.  It all depends on the size, quantity, and color.  Dark stones and rocks will absorb more heat than white or light-colored stones.  Larger stones and rocks also cover more area with fewer stones, so if the rock mulch needs to be completely removed, it’s an easier process than with pebble mulch/gravel.  A pretty good covering of larger stones will also help prevent soil erosion to some extent.

P.S. Try to get local rock, if at all possible.  Moving rocks takes a lot of energy.

3. Pumice rock is a very lightweight, porous rock that comes from volcanic eruptions.  It is often used as a mulch in flower beds and other perennial garden beds.  It has the ability to trap and retain moisture, because it’s so porous, which none of the other rock mulches are able to do.  However, if it is sitting entirely on the top of the soil level, it takes a significantly longer amount of time for water to penetrate down into the soil (which means, for example, that you’ll have to set your sprinkler to water for an hour instead of 30 minutes when you first use pumice rock as a mulch).  Once the pumice rock has settled into the soil and ‘combined’ with the soil somewhat, the rate of water penetration takes less time (water gets down into the soil much more quickly), and the pumice maintains the advantage of retaining water.  Since pumice is quite porous, it will absorb some heat from the sun, but not as much as the other rock mulches.  (The red rock in the above picture is pumice.  Click on the picture for a closer view.)

 

straw mulch on a vegetable garden

4. Straw mulch happens to be one of my favorites… in memory at least, because I remember spreading straw mulch on pathways in our family garden when I was growing up.  However, in my opinion, there are several problems with straw mulch that don’t make it a very desirable option.  Straw has a high carbon to nitrogen ratio, and it doesn’t break down very quickly (see this article to understand more about the carbon to nitrogen ration, and why it matters in composting/mulching).

That wouldn’t matter so much, because it’s being used on top of the soil, rather than in the soil, except that if you spread straw as a mulch in your garden in the summer, it will make the perfect home for all sorts of mice, voles, and other critters for at least a year or two, right through the winter and into your next growing season.  Also, straw is light colored and unless you spread a very thick layer, it doesn’t block out the light very well, and the weed seed will have plenty of light to germinate and grow right through it.  Also, straw can sometimes contain weed seed, which may only add a problem to your garden.  All in all, I don’t recommend using straw mulch.

If you already have straw mulch in your garden and especially if you’re experiencing problems with rodents, it might be a good idea to get a cat or two.  Rodents can cause big problems, and hugely decrease yields in your garden.  It’s worth it to get a cat and get on top of the problem as soon as you can, because they’ll breed, well, like rodents!

5. Newspapers and cardboard can be very useful in the garden.  They’re very similar in how they’re used, and their function is mainly to suppress weeds and eventually decompose and add a little bit of organic matter.  Laying down a mat of newspaper or cardboard is guaranteed to block out all light from the soil beneath.  However, newspaper is more effective because it forms to the contours of the land, making it a more effective weed control.  Once you’ve laid down a cover of newspaper, then you just make a hole in it (cut an X with a knife, or just punch right through it with your hand or a trowel), and plant your plants exactly where you want them.  Or spread the newspaper right around established plants. Newspaper is a bit unsightly, though, so I would recommend laying another type of mulch, perhaps compost or wood chips, on top of them.  Besides, that’s added organic matter, and that is definitely a good thing.

One interesting thing that I’ve observed has to do with worms.  After spreading newspaper/cardboard on the ground and covering it with a layer of compost (in my veg garden), whether I’ve done it in the spring, summer, or fall… the next time I’ve cultivated the ground, when I shift about the layers of partly decomposed paper stuff, there always seems to be huge gatherings of worms under and around them.  I don’t know the reason for it, but I’ve come up with a few theories:

  • Perhaps the worms like sliding around right underneath the newspaper because it’s like having soil above them, as they usually do when they dig their tunnels, but it’s not quite so much work to wriggle around right underneath a layer of newspaper.
  • It gets pretty moist under newspaper/cardboard, especially after it rains, and as usual, the worms try to come up for air as their tunnels are flooded, but they make it as far as the newspaper/cardboard, but they’re not able to get through that layer (which doesn’t seem to matter too much, because the worms are always alive beneath the newspaper/cardboard, that I’ve seen).  This might actually be an advantage, because when worms come up for air after a big rainstorm, it makes them easy pickings for birds.  But if they stay under the layer of newspaper/cardboard, they’re safe from birds, while still avoiding being drowned.
  • Maybe it’s simply because it’s a little warmer there in the winter and cooler in the summer… who knows?

One issue I want you to be aware of, in regards to newspapers, is that colored ink in newspaper can be hazardous.  The jury is still out on this one, as far as public opinion goes, and it’s a much debated topic in gardening forums that I’m part of.  So I’ll just give you my two cents worth, and you can decide for yourself.

The current inks used for newspapers are soybean-oil based.  Carbon black, a carbon-based and biodegradable compound, is added to make black ink.

For the colored inks, however, a variety of other elements/metals are used (think sulfur, for example… it creates a great yellow color).  For the colored inks, there is such a huge variety of color needed and printed every day, that you can never be sure what they’ve used.  Last I read, about a year and a half ago, lead was still used in some inks in those shiny weekly inserts produced by some stores (I won’t name any here, because I don’t want to get sued, if it happens to have changed since 18 months ago).

Given that information, I would recommend only using black-inked, gray-papered newspaper, and definitely avoid the shiny, white-paged, heavily colored newspapers.

Now, for the other side of cardboard: Cardboard generally consists of one or two layers of a ‘sandwich’ of paper: bottom is flat, middle is wavy, top is flat… that equals one layer.  To hold the layers together, usually a ‘glue’ of cornstarch is used.  At the open corner, however, where two sides are glued together to make the box shape complete, a different glue is used.  I don’t know what that glue is made of… there seem to be no sources online that will give me the details.  And it’s likely there are several different types of glue used, depending on who makes the box and what it’s intended use is.  This being the case, I would recommend that you cut out that corner of ‘mystery glue’, and use the rest of the box.  BUT, there’s one more thing to be aware of…

Some boxes are treated with water and/or flame retardant chemicals.  How do you know if the cardboard you’ve got has been treated or not?  Well, you won’t always know.  Sometimes a glossy sheen might tell you, but that could also just be wax (which you’ll often see on boxes that ship produce).  Sometimes there will be no indication whatsoever that it’s been treated.  So… I know it sounds a little tough, but it’s better to be safe than sorry, and I don’t use cardboard in my garden unless I’m sure it hasn’t been treated or contaminated in any way (which, sadly, isn’t often).  Remember, if you put it on or in your soil, it’s easily eaten by bacteria, and those chemicals move on up the food chain to worms and birds.  Also, your plants could easily take up some of those chemicals, and you eat your plants!  When I think of it like that, I’d rather pass on the glue and chemicals.

6. Grass clippings can be a great addition to your garden, and depending on the stage they’re in, they can be added on top of your soil as a mulch, or worked into your soil for some added organic matter.  There are two stages of grass clippings… when they’re still green, and when they’ve turned brown.  If they’re still green, as you see in the picture to the left, grass clippings are full of nitrogen (that’s what gives them the green color) and they’ll break down really well in the soil, releasing all those nutrients, including nitrogen, into the soil.  But if you’ve left them out for a bit and they’ve turned brown (it doesn’t take long), all that nitrogen has been lost (see this article to understand more about the carbon to nitrogen ration, and why it matters in composting/mulching).  Nitrogen is quite volatile and escape back to the atmosphere very quickly.  That’s one reason why grass clippings turn brown quite quickly after being cut or pulled from the soil.  Once they’ve turned brown, just use the grass clippings on top, as a mulch, or add them to a compost pile and make sure they’re well-composted before they’re added to garden soil.

One other thing to keep in mind is whether or not the grass has been treated with any herbicides, fungicides, pesticides, etc.  If any chemicals have been used on the lawn where the grass clippings came from, it’s best to chuck them.

All the more reason to avoid using chemicals on your lawn… so you don’t have to throw away all that awesome organic matter that could otherwise be benefiting your garden!

7. Compost is great to use as a mulch.  As long as it’s well-decomposed, it can go on top of or in your soil without any concern whatsoever.  It is best, if you’re making compost yourself, to make sure the pile is turned regularly so it gets as hot as possible, to try to kill any weed seed that may have made it into the compost pile.

Compost also tends to be slightly acidic, so it’s an especially great addition to a garden with alkaline soil (for more on that topic, read this article to understand Soil pH and the effect it has on nutrient uptake).  Other than that, I have no recommendations, except to make as much compost as you can, and enjoy using it on your garden!

8. Landscape fabric is a black fabric, generally made of woven polypropylene, which means it’s a form of plastic.  Being made into a woven, fabric-like material makes it breathable.  It’s supposed to let the water in but keep sunlight out.  And it does generally work, as far as I’ve seen.  But it’s still a plastic material.

It does have one great benefit, especially for gardeners who live further north and typically have a shorter growing season.  Melons, particularly watermelons, need plenty of heat and sunlight to grow a healthy, strong plant, and to produce delicious, large, sweet watermelons.  Using a black, landscape fabric catches the heat of the sun, warming up the soil beneath it sooner than usual, and keeping the soil a little warmer at night, making it possible to plant out watermelons and other heat-loving crops a little sooner than you otherwise would be able to.

There are two problems with landscape fabric.  First, although it’s supposed to let water in and keep light out, I have found that it takes a bit of doing to get the water to actually go through the cloth, especially when it’s brand new.  That means instead of setting your sprinklers to water for 30 minutes, you might need to water for 60 minutes, to make sure enough water is making it through the landscape fabric.

It becomes more penetrable as it grows older, though… both from above and below.  That means that while the water can get in more easily as the fabric ages, the weeds can more easily catch a bit of sunlight, germinate, and push its way up through the landscape fabric, which I’ve seen happen on countless occasions.  When that happens, if you want to maintain a weed-free garden, you’ll have to replace the landscape fabric or use another method.  This brings us to our next problem.

If you’ve laid down a huge landscape fabric, made some cuts in it, and planted perennials in the openings, when it comes time to replace the fabric, you might have a bit of a job on your hands.  Depending how large the area is, if you don’t want to dig up all your plants, you’ll have to rip holes in the fabric big enough to pull it up and away from your plant.  And then imagine trying to get a new one settled back over your plants.  Time to find a different kind of weed-suppresser… how about newspapers covered with wood chip mulch?

The last thing I’ll say about it is that the only reason I would personally use landscape fabric is to grow melons better and earlier.  But with a bit of thought, there are alternatives that can be used.  Like using big rocks (especially if they’re dark) to create a warmer microclimate area for a melon patch.  Or building raised beds sided by dark-colored bricks.  That would be a beautiful display anyway, with the melon vines falling over the sides!  So, I’ll leave the ultimate opinion on landscape fabric to you, but I think I’ll use something else.

9. Wood chips and shredded bark have similar functions, so I’m grouping them together, but in reality, shredded bark doesn’t even compare to wood chips.  I don’t know why.  You’d think they were similar, but wood chips out-perform shredded bark by a long shot.  They’re a high carbon-to-nitrogen material, so they’re great if you use them on top of the soil as a mulch, but DON’T dig them into your soil.  They cover and insulate plants’ roots quite well, which helps protect against fluctuating and extreme temperatures.  They hold moisture fairly well, which will help keep the ground around your plants moist in between waterings.  And they’ll slowly break down, adding organic matter to the soil.  Wood chips seem to be a “miracle mulch” in my opinion.

One thing to consider in regards to wood chip mulches has to do with the subject of allelopathy.  In the dictionary, allelopathy is described as the phenomenon when the growth of one plant is suppressed by chemicals produced by another plant growing nearby.  The negative side of allelopathy always seems to get the focus, but allelopathy isn’t always a negative thing.  It can also refer to a positive situation, where one plant produces chemicals that enhances the health and growth of other plants.

As far as wood mulch/shavings go, however, we do need to consider the negative effects of allelopathy.  One of the best examples of this is the black walnut.  Everyone seems to know that black walnut isn’t a very good tree to have growing near other plants.  The reason is that the Black Walnut tree exudes a compound called juglone from its roots, nuts, and leaves, which suppresses nearby plant growth.  You probably won’t find any black walnut mulch being sold anywhere, but just in case you have a big black walnut tree on your property that you’re going to chop down and have it chopped up into a mulch… well, now you know that it wouldn’t be the best idea to use that mulch in your garden.  Below is a list of common allopathic trees/bushes in the United States.

Common allelopathic trees/bushes

1.Black Walnut

  1. Eucalyptus
  2. Sage brush
  3. Tree of Heaven (sometimes called ‘ghetto palm’ or ‘stink tree’)
  4. Several pine, juniper, and cedar trees

You’ll notice that pine, juniper, and cedar are on the list, even though wood chip mulches are often made from these woods.  Their effect isn’t nearly as strong as the black walnut, and in truth, very little would be contained in or exuded by the wood chips.

cocoa pod by janhamlet via Flickr, attribution, non-commercial, share alike

A cocoa pod; showing the shell exterior of the cocoa beans.
Photo credit

10. The use of Cocoa hull mulch is a much-debated topic.  There are some people who love it, some who are afraid of it, and some who have never used it.  Cocoa hull mulch (or just cocoa mulch) is just a woody type mulch, made from the shell of the cocoa bean.  It is light weight, and a bit hard, like a nut shell.  It has it’s ebbs and flows of popularity and rejection, mostly because now and then people become wary and afraid of it because of its possibility of toxicity to animals.

Everyone knows that chocolate is toxic to dogs and cats, because of its content of theobromine and caffeine.  Cocoa hull mulch contains both compounds as well.  However, the content of theobromine in cocoa hulls may be nearly non-existent, or it may be nearly twice as much as chocolate.  It depends on how it’s treated.  Sometimes the cocoa hull mulch is heat-treated to remove as much of the oil or fats within the cocoa hull as possible, which will remove some of the scent and theobromine (since the scent compounds and theobrimines are associated with the oil/fat), decreasing the sweet smell that attracts animals as well as the harmful theobrimines.  Sometimes the mulch isn’t treated at all, and retains both its scent and its theobromine content.  So the amount of theobromine in cocoa hulls is hugely varied.  Considering that cocoa hull mulch can contain from 300-1200 mg/ounce to begin with (that’s a huge range – a four fold difference!), and also considering that some cocoa hull mulch is treated and some isn’t, there’s a lot of variability in the possible dangers of cocoa mulch.

Considering all that, if you have animals, it may be taking a bit of a gamble on your dog or cat getting sick to use cocoa mulch on your property.  It’s not often that an animal is killed from eating cocoa mulch, but it does happen.  And you don’t want your neighbor’s dog to die, either.  That could lead to all sorts of issues.  So… just be sure to make a wise decision, depending on your circumstances, on whether or not you use cocoa hull mulch.

11. Pine straw is a great possibility for a mulch in the right area.  Since pine needles are thin and wispy, like straw, you’ll need a fairly thick layer of them to be sure to suppress weeds.  But they last for forever, and if you can find a free source, it’s a very economical option as well.

Here are a couple of things to consider.  First, as a benefit, pine needles are quite acidic, which can be a really good thing for alkaline soils.  Optimally, soil should be slightly acidic.  Using pine needles as a mulch will slowly affect the pH of the soil, making it more alkaline.  But again, don’t dig the pine needles into your soil… unless they’ve been thoroughly composted first.  Just use them on top.

Second, pine needles may also have an allopathic effect.  Fresh pine needles contain a great deal of allelopathic compounds, but the amount decreases as the pine needles age and decompose.  Different allopathic compounds work in different ways to affect the growth of other plants.  Some compounds prevent other plants from being able to respirate, some prevent the germination of seeds, etc.  The compounds in pine affect seed germination, so fresh pine needles spread around existing, established plants, in a perennial bed with bushes or other perennial plants, would be an excellent way to suppress the germination of weed seeds.  As long as it’s not suppressing any seeds you want to germinate, pine needles would be very useful around perennial plants.

And since the allelopathic effect of the chemicals decreases as the pine needles age and decompose, a compost of pine needles would probably be a great option for a garden because of its acidifying effect on the soil.  If you want to be safe, you could work in the composted pine needles in areas where you won’t be directly planting seeds in the ground, but where you’d be setting out transplants instead.

Well, I hope you enjoyed that thorough analysis in the different mulches, and I certainly hope you find it useful!  Please let us know of any comments or questions you may have.  We always love hearing from our readers!

About Anni

Gardening for life, liberty, and happiness. I love running, hiking, being with my family, gardening, cooking (most especially the stuff we pick from our garden), and reading.

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34 Responses to Mulches: Types and Uses

  1. J.C. March 21, 2013 at 9:50 pm #

    We used straw mulch one year when I was a kid and we still had tons of weeds. And then the worst thing was that it left seeds everywhere and actually caused more weeds. So I would agree with you – I don’t think I would ever use straw mulch on my garden.

    • Anni March 21, 2013 at 10:12 pm #

      JC,

      I have used straw mulch elsewhere, and it does work… as long as you lay it about 10 inches thick. I guess it just lets too much light through or something, so unless it’s really, really thick (like on pathways or something) I agree with you that straw mulch just isn’t worth it. And finding clean straw mulch (without the grass seed) can be difficult.

      Besides, I love using wood chips and compost so much and they’re easy to get ahold of. :)

  2. KM March 21, 2013 at 9:54 pm #

    Is it necessary to add mulch to potted plants? Are there benefits or drawbacks to adding it or not?

    • Anni March 21, 2013 at 10:09 pm #

      KM,

      With potted plants, it’ll actually depends on the type of plants you’re growing, your preferences, and what effects you’re trying to achieve.

      For example, some potted plants might benefit from rock mulch, because it helps keep them warmer during the cold months. This is advantageous, because in cold seasons, the roots of plants that are planted in the ground are protected by the soil from cold weather and frosts. But for potted plants, their roots are sitting in the pot, above ground, and are much more likely to feel the effects of cold weather. Adding rocks (especially dark rocks) would soak up the heat of the sun during the day, and radiate the heat at night, helping to keep the plant warmer.

      If you’re growing potatoes in pots, you’d be going for different effects because potatoes don’t like their roots to get too warm. I’ve seen people grow potatoes in those black plastic pots, or even black garbage bags, in the spring. The problem is, those black pots or bags will soak up the sun, and very soon, it will warm the soil inside, the potato roots will be warmed beyond its comfort point, and the tubers stop growing. So then you’d get really small potato tubers. Which is fine, unless you were going for big potato tubers. Mulching around the pot with straw, for example, would reflect the light of the sun and the pot wouldn’t heat up nearly as quickly.

      If I were to give a general, over-all recommendation, I would say to mulch all your potted plants with well-composted compost. The addition of the organic matter will help to keep the potting soil light airy, so the soil in the pot doesn’t get too compacted. And as you water your plant each day, the compost will leech nutrients into the potting soil that your plant will be able to use.

      I hope that helps!

  3. Migsy March 22, 2013 at 2:56 pm #

    Thanks for the note about newspapers. I’ve always wondered about that. I haven’t used newspapers in my garden because I was worried about the ink. I think I might give them a try this year. I’m sick of weeding.
    And it’s good to know about the boxes. I wouldn’t have even thought of fire retardent chemicals or other chemicals being on the cardboard!

    • Anni March 22, 2013 at 3:20 pm #

      You’re welcome! Thanks for stopping by.

    • Anni March 22, 2013 at 9:43 pm #

      Migsy,

      I had never considered chemicals on cardboard either until a friend of mine mentioned to me that she had wanted to compost her boxes, but someone told her not to because they had been sprayed with ‘something’. I decided to find out what that something was, and learned about the fire retardant chemicals. Who knew?!

  4. Jake's Mom March 27, 2013 at 7:12 am #

    I used straw mulch one year and I loved it, and then the next year it didn’t do so well. I think it’s because the first year I put a lot down, so it made a really thick layer, and the next year I didn’t put down as much. My neighbor said that it allows too much light to get through unless it’s really thick. So I do like using straw mulch, but it does have to be in a really thick layer.

    • Anni March 27, 2013 at 8:23 pm #

      Jake’s Mom,
      You’re right… Because the straw itself is light in color and a thin material, you have to have quite a lot of it for it to really work well as a mulch. If it’s used in a thick layer and comes from a truly weed-free source (so it doesn’t spread more weed seed in your garden) straw mulch can be a good mulch.

  5. Anni May 3, 2013 at 5:19 pm #

    We don’t have a garden forum (yet… we may someday) but there are several good ones out there. Here are a few links to get you started:
    http://forums.gardenweb.com
    http://www.theeasygarden.com/forum/
    http://davesgarden.com/community/forums/
    http://forums.finegardening.com/
    I hope that helps!
    ~~Anni

    • Leonore Neumann May 5, 2013 at 5:19 pm #

      Hi Anni, I am wondering about the possibility of acquiring histoplasmosis from using pine needles as mulch. It is a fungal disease that is fairly common in northern Minnesota, Michigan, and Wisconsin among people who work in the woods and are exposed to decaying pine needles. Do you have any information on this?

      • Anni May 6, 2013 at 7:34 am #

        Leonore,
        I’ve never heard of a gardener who got a histoplasmosis infection from using pine needles as a mulch. Histoplasmosis infections are more likely to occur where there are a lot of bird or bat droppings, which is much more likely to occur in a forested area, than in a garden. Birds and bats tend to live in trees and other things, and that’s where their droppings are going to accumulate. So I don’t think you’re likely to have a problem with it from using pine needles as a mulch.
        ~~Anni

  6. Paul Griffith May 5, 2013 at 3:28 pm #

    I got two large loads of wood chis from my electric power company they were cleaning the right of way I live on a farm and enough land to store this much out of site. Now my question I was telling a neighbor about my mulch (it is pine and oak mixed ) she said wood chips would cause a roach infestation what do you think ?

    • Anni May 6, 2013 at 7:59 am #

      Paul,

      There are many types of roaches, and even though we think of the roaches that tend to get indoors, there are many that live primarily outdoors. And most of them do love wood chips, straw, and pine needles. If you keep the pile well away from your house, then even if the pile gets infested by cockroaches, they won’t move indoors too. So that’s number one… keep it away from your house.

      It doesn’t really matter what mulch you use, any mulch has the possibility of attracting cockroaches. They can certainly be pests in the garden, because they’ll often feed on young seedlings. So if your pile gets infested, you’ll want to control the roach population in the pile before you spread it on your garden. (That’s “if”. It’s not guaranteed that it will get infested.) The number one way to keep cockroaches away, or to at least manage their population, is to use birds. Make sure your property attracts plenty of birds and they’ll enjoy making meals of any cockroaches that may come.

      And again, I wouldn’t necessarily say having a wood chip pile will cause an infestation of cockroach. It has the potential of attracting them, but that doesn’t mean they’ll come and become so numerous it will cause an infestation.

      Plenty of places, whether they’re private residences or business buildings, use some form of wood chip mulch in all the ornamental garden beds around the building. It depends on weather, environment, birds, availability of food, etc. If there’s an apple orchard down the road, then all local cockroaches are likely to hightail it for the apple orchard and leave your wood chip pile in the middle of a field alone. Or if your wood chip pile is right next to a pick-your-own berry farm, it may become a convenient destination for cockroaches to live.

      So I guess what I’m saying is yes, there’s a possibility it will attract cockroaches. It seems like almost anything has the possibility of attracting cockroaches. But it depends on a lot of things. And whether or not it will become an infestation will also depend on a lot of things, mainly availability of food around the area.

      I hope that helps. Thanks for stopping by!

      ~~Anni

  7. Guy Lessard May 5, 2013 at 4:45 pm #

    Quick note on wood chips. Never use them on plantings around a house. They can and will attract termites into your home. Otherwise they are fine in the garden.

    • Anni May 6, 2013 at 8:01 am #

      Yes, I have seen a couple of instances where termites were attracted to wood chips around buildings and caused problems with the buildings themselves. Thank goodness it doesn’t happen more often, especially with how often wood chips are used on all sorts of ornamental garden beds around business buildings and homes alike!

  8. Guy Lessard May 5, 2013 at 4:53 pm #

    Oh and I should mention that I live in New England and have had great success using weed-block fabric on my vegetable beds. The trick about watering is to run a drip hose underneath the fabric. The drip hose lets you use less water and put it where it does the most good. Plus fabric has another benefit, it suppresses disease spores which are bounced up onto a plant from the soil when watering from above. So I use it to suppress weeds, disease and for heating the soil.

    • Anni May 6, 2013 at 8:06 am #

      Drip hoses underneath the fabric would work well. I also like soaker hoses in those instances too.

      My dad used to used the black garden fabric it for heating the soil too (in Idaho), to try and grow watermelons, which we were successful at probably 1 out of ever 4 or 5 years. :)

      We’ve seen other people use wood chips (chopped up trees and branches with varying sizes of wood chips from fine, needle-like bits to big chunks) in their gardens, and it protects the soil and holds enough rainwater that they practically never need to water except just after sowing, to keep the seeds moist. That’s what we’re doing this year, and I’m excited to observe the results for myself. I’ll let you know how it goes.

  9. Steve Rambo September 16, 2013 at 8:49 am #

    Can you tell me if it permissible to use gravel as a mulch around my Mexican Fan Palm trees. Thanks.

    • Anni October 21, 2013 at 8:49 am #

      Hmmm… I really don’t know! From what I know of palms in general, I would assume it’s fine, but I couldn’t tell you for sure.

  10. RAM October 27, 2013 at 2:41 pm #

    great article, thanks. What is the best mulch to use around mature dogwoods? it’s all lawn & I am slowly adding bulb, perenial beds & groundcovers, I’d like to reduce my mowing as well

    • Anni November 12, 2013 at 1:47 pm #

      I would probably use wood chip mulch. Make sure it’s not all tiny stuff (sawdust or pellet size). Since it’s not a garden, it can be fairly coarse, but ideally, it would have a pretty good mixture from toothpick size to thumb-size chuncks. And I’d make it pretty thick – I’d say at least 12 inches thick. Also, don’t lay it right up agains the trunk. Make sure there’s a couple of inches of breathing room. But the mulch will help keep out weeds and keep the soil moist underneath.
      One other thing – you mention reducing lawn. If there’s already grass growing around the dogwood, the mulch won’t necessarily keep it from growing. The thicker you lay it on, the more likely it is that the grass won’t get sunlight and won’t manage to break through. BUT, there’s always the possibility that some blades of grass will. You can’t really solarize the area or dig up the grass, since it would likely damage the roots of the dogwood trees as well. But if some grass comes through, just pull it out by hand, taking care to bring the roots with it. Over time, hopefully, the mulch will keep the grass down and the dogwood tree growing well. There will always be some maintenance when it comes to yarding and gardening. :)

  11. Ann February 24, 2014 at 12:25 pm #

    Re wood chips: Have you used wood chips as a mulch for vegetable gardens &fruit trees/bushes? If so, for how many years or seasons? Can I use freshly made chips in these places?

    Also, what do you do with the chips used as a top dressing when preparing the bed, e.g. tilling, for the next growing season?

    • Anni February 24, 2014 at 3:27 pm #

      Ann,

      We have used wood chips as mulch. If you do use wood chips, they need to be chipped up branches and etc., with all different sizes of wood in the mulch.

      We don’t till. We just pull the wood chips aside and plant. Tilling breaks up the living soil system and kills tons of worms.

      You can leave the wood chips on permanently, really. Top dress with a fresh supply of wood chips every few years. It protects the soil a ton.

      If you want good, thorough, in-depth info on this topic, go watch Back to Eden (Here’s the video link: http://vimeo.com/28055108). It explains it incredibly well.

      Wishing you the best!

      Anni

  12. Heather March 6, 2014 at 8:54 pm #

    Anni,

    I just had a large ash tree removed and the stump grinded. If I were wanting to use this as a mulch in shrub beds around the house, do you think it would be a problem? Do I need to let it sit for a few months first? It did have some Ash anthracnose. My shrubs are indian hawthorns and dwarf nandinas.

    Thanks,
    Heather

    • Anni March 8, 2014 at 2:32 pm #

      Heather,
      Since Ash Anthracnose only affects Ash trees and doesn’t spread to other trees or shrubs, it should be fine to use as a mulch. Just on top, of course. It would probably make a lovely mulch, actually. You don’t have to let it sit. It should work as a fine mulch right now.
      Anni

  13. Amy March 7, 2014 at 5:28 pm #

    I live in a townhouse community in the southeast. Most of the homes have no gutters and most yards have quite steep slopes, especially in the back yards. In the back yards, any annual/perennial planting is the responsibility of the owners (not the HOA), which means most homes in the back are completely bare, even though there are planting beds installed adjacent to the buildings themselves.

    Would pine straw application where there are no gutters and a steep slope help slow or or eliminate soil erosion on its own merits, even when there are no plantings in the beds where the pine straw is applied?

    Thanks!
    Amy

    • Anni March 8, 2014 at 2:35 pm #

      Amy,
      Yes, it would help. The pine straw would intertwine and ‘mat’ together a bit, so it’ll help. On a steep slope, it may shift and there may be some erosion. But it’s still definitely better than leaving the soil bare. By a long shot.
      It’ll also help where there are no gutters, because the pine straw has more ‘bounce’ to it, and can take the pinging or pouring of water a lot longer without being shifted, where the soil would be simply washed away.
      I would definitely lay down some mulch (pine straw or other)!
      Anni

  14. Ryan Lamanna June 2, 2014 at 5:54 pm #

    Fantastic article. What do you recommend for direct sowing? Allowing the seedlings to mature some and then mulching?

  15. rick June 22, 2014 at 7:30 pm #

    what about osage orange mulch? i would think it would last a long time.

    • Anni June 25, 2014 at 4:34 pm #

      I’m sure it would work great, even if it is a little odoriferous. :)

  16. Elle July 30, 2014 at 10:29 am #

    Just wondering if it is possible to use manure as a mulch, it horse manure and the horses are not exposed to weeds so the manure would be weed free.

    • Anni July 31, 2014 at 10:13 am #

      Manure, especially if it’s free from weed seeds, would be an excellent mulch. The only precaution I would give is to not put fresh horse manure right up against your plants, or it could ‘burn’ them, because of the richness of the manure.
      However, if it has been composted well, then it can be spread throughout your garden, without worry of burning your plants.

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