Mulch is an essential part of your vegetable garden, and if you want your veggie garden to flourish, picking the best mulch plays an important role.
I avoided mulch for years; it seemed unnecessary and an added expense, but I was wrong. Mulch prevents weed growth (saving you time!), retains moisture in the soil, prevents the spread of disease, and so much more.
Spreading mulch around your vegetable plants is an important step after you plant your crops. Not all mulches are the same, so choosing the right mulch will lead to a healthy garden.
Two Types of Mulch for Vegetable Garden
When you think of mulch, you may think of the bags of wood chips from stores, but it is more than that. Mulch is any material that covers the soil, protecting it from erosion, preventing weeds, and more.
So, that means there are dozens of mulches, but since most people mulch their flower beds or around their shrubs, you may only recognize rocks or wood chips.
Mulch belongs in one of two types: organic and inorganic.
Organic Mulch: The most important factor of organic mulch is that it decomposes over time, returning nutrients to the soil. The breakdown of organic mulch improves soil quality and texture. It gives more benefits than preventing weeds; it will encourage more plant growth.
Options for organic mulch include:
- Fall Leaves
- Pine Needles
- Grass Clippings
- Wood Chips
Inorganic Mulch: On the other hand, inorganic mulch will not decompose. If it does, it takes a lot of time. However, it is highly effective at preventing weed growth, which may be what you need for your vegetable garden.
I struggle with weeds, and I have no shame in using landscape fabrics where they may be needed to help with weeds.
Inorganic mulch options include:
- Landscaping Fabric
- Black Plastic
10 Best Mulch for a Vegetable Garden
One of the best mulch for a vegetable garden is compost. It’s ideal for veggie gardens because, over time, it improves soil quality and structure. Compost will protect the roots safe and insulated.
Best of all, compost is easy to make yourself. However, you can find compost bags at most garden stores and order them in bulk from local nurseries.
Adding compost to your vegetable garden beds as a mulch will feed beneficial bacteria and earthworms and release chemicals that prevent plant diseases. Compost reduces soil erosion, but it isn’t ideal for suppressing weed growth. You must apply two to three inches, minimum to reduce weed growth.
Related: 15 Things You Should Never Compost
2. Grass Clippings
Are you looking for free mulch for your vegetable garden? Grass clippings are an easy option. They quickly decompose, adding nutrients into the soil, and cost NOTHING.
Who doesn’t love that?
If you use grass clippings on garden beds, ensure they are dry and disease-free. Wet grass clippings form a thick mat, preventing water from reaching the soil. It would help if you also were sure the grass is not sprayed with herbicides; that will leach into your soil and affect your plants.
However, grass clippings have some negatives. Since they decompose fast, you need to continue to add them to your garden bed. They also introduce weed seeds to your beds; some think grass clippings look messy.
Straw is another fantastic choice for a vegetable garden mulch. If you practice winter gardening, mulching insulates the soil and prevents frost heaving. However, when you use straw, be sure you have straw rather than hay; weed seeds live in hay and will cause more weed growth in your garden beds.
While straw may not be the prettiest mulch, it is inexpensive and easy to find. It is available at most garden stores.
Make sure you lay three to four inches of straw over the ground. However, it can attract rodents and easily blow away. Make sure you water the straw.
4. Wood Chips or Shavings
One of the most common types of mulch for a vegetable garden is wood mulch. Pine bark mulch is a good choice if you want to use wood chips because it takes less nitrogen from the soil. As it breaks down, pine bark adds nutrients to the soil.
Plus, it’s easily
There are some downsides. Wood sucks up nitrogen at the soil surfaces as it decomposes, which often leads to a nitrogen deficiency in plants. You may notice yellowing leaves and slower growth when using wood chips or sawdust.
5. Black Plastic
Black plastic is a common choice for gardeners, but this is an inorganic mulch. It warms the soil and stops weed growth. You need to spread it over the soil tightly, using metal pins to keep it in place. Then, you cut holes where you want to plant seeds or seedlings.
Some plants thrive when gardeners use black plastic because they love warm soil. For example, melons, tomatoes, and peppers thrive with black plastic. Some evidence suggests you will receive a larger yield when using black plastic because it warms the soil temperature more than other forms of mulch.
However, black plastic will break down when exposed to sunlight, so you typically need to bury it under another form of mulch for it to last more than one growing season. Another option is to use a thick, landscape fabric rather than plastic; woven fabric will last longer but has a higher price tag.
Another downside is you need to punch holes into the plastic because it prevents water and oxygen from penetrating the soil. It could reduce plant growth if used incorrectly.
Another free mulch source for vegetable gardens; if you have trees in your yard, you have mulch available. Fall leaves control weeds and gives your garden extra nutrients. Over time, leaves will improve soil structure, add more organic matter, and increase water retention.
Ideally, gardeners use partially decomposed fall leaves, called leaf mold, for their mulch, but you also can shred dry leaves for another option. Make sure you don’t add leaves from black walnut trees because they contain juglone, a chemical that is harmful to many vegetable plants.
The downsides are that dry leaves blow away, and wet leaves form a stinky mat. So, I find leaves are best mixed with other forms of mulch.
7. Pine Needles
If you have a pine tree or two in your backyard, you have a free source of pine needles, often called pine straw. Pine needles are ideal for acid-loving vegetable plants, such as:
Pine needles lock together, so they won’t blow away easily and prevent soil erosion well. If you have plants that prefer alkaline soil, it’s not ideal to use pine needles.
However, it is important to note that, while pine needles contain acid, as they break down, they neutralize. Pine needles have a longer lifespan than most natural mulch for a vegetable garden, around two to four years. They also look nicer than shredded leaves or newspaper.
Don’t toss out your Sunday newspaper! Newspaper is an excellent option for weed suppressing, and they decompose quickly.
All you have to do is soak the sheets with water once you lay them in your garden to make them stick together. Then, spread another layer of organic mulch over the paper to keep them down. If you don’t, they will blow away once the newspaper dries in the sun. Ideally, you want three to six sheets in each area to suppress weeds.
Over time, the newspaper decomposes, returning nutrients to the soil and improving the overall soil structure. However, decomposing newspapers will remove nitrogen at the soil surface, so consider spreading nitrogen fertilizer before laying down the newspaper.
The biggest downside to the newspaper as a mulch for a vegetable garden is that it is visually unappealing. Also, it prevents soil-air nutrient exchange.
Another option to consider instead of newspaper is cardboard. Cardboard suppresses weed growth and is inexpensive, especially if you love Amazon! Over time, cardboard decomposes, adding nutrients back to the soil.
Ideally, you will add another layer of a different type of mulch over time. Cardboard has to be anchored to keep it from blowing away; rocks work as well. Cutting holes to make the cardboard fit around your plants is a bit tricky as well. If you want mulch for paths in your vegetable garden, cardboard is an excellent choice when placed under gravel or pea gravel.
10. Cover Crops
The last option to consider as a mulch for a vegetable garden is cover crops often called green manure. This is a living mulch because a cover crop returns nutrients to the soil while discouraging weeds and decreasing erosion.
One of the benefits of cover crops is that they need less care than vegetables, but you have to water and trim them. Otherwise, cover crops spread and take over your garden.
Some of the most common cover crops are:
Growing clover or winter rye in the fall prevents your soil from being uncovered during the winter. All you have to do is plow them in the spring. If you have dormant beds throughout the growing season, cover crops are easy to grow and need to be shredded at the end, acting as a mulch again once shredded.
Make sure you pick a mulch for a vegetable garden and consider your goals with mulching. What is most important is adding mulch to your garden because you’re missing out if you don’t!