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What grows well in compost?

Author

James Craig

Published Jan 11, 2026

One of the most obvious choices is any type of legume, like clover or alfalfa. These plants fix nitrogen and are easy to grow between rows and at the edges of gardens. Harvest them and toss the clippings into your compost pile for added nitrogen. A couple of herbs are also great composting plants: borage and comfrey.

What can you grow with compost?

Most plants simply need more structure, water retention and nutrients than compost alone can provide. There are certain crops, however, that can do well when planted in pure compost. Along with tomatoes, as discussed above, pumpkins and squash are two other crops that can do well growing in pure compost.

Can you grow plants directly in compost?

You cannot grow plants in compost only because the material is too light and will cause the water to drain too fast. The soft and crumbly texture will not provide good support to the plant's roots and cause it to topple over. The compost can lead to excess nutrients making it toxic for the plants.

What are the best things to put in compost?

Good things to compost include vegetable peelings, fruit waste, teabags, plant prunings and grass cuttings. These are fast to break down and provide important nitrogen as well as moisture. It's also good to include things such as cardboard egg boxes, scrunched up paper and fallen leaves.

Can you just use compost as soil?

You can use compost instead of soil to boost your plant's growth. You can also mix both to reduce waste. It also aids in increasing soil fertility by providing nutrients for plants. Using compost as soil reduces the need for chemical fertilizers and pesticides, which researches prove to cause environmental harm.

40 related questions found

Should I mix compost with soil?

Mixing compost with soil provides nutrients for plants today but also enhances soil for future years. The amendment naturally breaks down, releasing important macro- and micronutrients while feeding the beneficial biological organisms in the soil. It also increases the porosity of the soil and helps conserve moisture.

How long does it take for compost to turn into soil?

Decomposition will be complete anywhere from two weeks to two years depending on the materials used, the size of the pile, and how often it is turned. Compost is ready when it has cooled, turned a rich brown color, and has decomposed into small soil-like particles.

Are eggshells good for compost?

A common question is can you put eggshells in compost heaps? The answer to this is yes, you can. Adding eggshells to compost will help add calcium to the make up of your final compost. This important nutrient helps plants build cell walls.

What materials should not be composted?

What NOT to Compost

  • Meat and Fish Scraps. ...
  • Dairy, Fats, and Oils. ...
  • Plants or Wood Treated with Pesticides or Preservatives. ...
  • Black Walnut Tree Debris. ...
  • Diseased or Insect-Infested Plants. ...
  • Weeds that Have Gone to Seed. ...
  • Charcoal Ash. ...
  • Dog or Cat Waste.

Can I plant seeds in compost only?

So while it may be tempting, planting in pure compost is not a good idea. That's not to say you shouldn't plant in compost at all. Just an inch or two of good compost mixed with your existing topsoil is all your plants need.

Do you plant seeds in soil or compost?

Seeds carry their own nutrients, so they don't need an enriched potting compost to germinate. Sow into firm compost or soil. Whether sowing indoors or out, prepare the soil by making sure there are no large lumps and firming it down.

Can you plant potatoes in compost?

Producing a healthy crop of potatoes in a bag, such as a compost bag, is much easier than you might think, and it's space-saving too. There's no earthing-up required, no digging and minimal mess. You can simply plant your seed potatoes in the bag, and wait for them to grow.

Which compost is best for vegetables?

Compost choice

  • Use sterile proprietary potting composts to obtain best results.
  • The soil-based compost John Innes No 3 is especially easy to manage, but other composts, including peat-free varieties, are also suitable.
  • Compost in grow-bags is often both good value and reasonable quality.

Can banana peel be composted?

Banana peels directly in the composter can create a small amount of organic soil but using whole rotten bananas and other vegetable scraps and plant waste can speed up the process and give you better results in the end.

Can cooked rice go in compost?

Cooked or uncooked rice – Here is another one that most folks would probably think is just fine to add into their compost, but it is best to avoid both cooked and uncooked rice. Uncooked rice is going to attract rodents to your yard, while cooked rice can lead to the growth of unwanted bacteria.

Can you put tomato plants in compost?

The answer here is, yes. Gardeners can compost tomato plants as long as the plants don't have any bacterial or fungal diseases. Spotted wilt virus and curly top virus will not survive on a dead tomato plant for long, so plants with these viruses can be composted.

Are onions OK for composting?

Can you compost onions? The answer is a resounding, “yes.” Composted onion waste is just as valuable an organic ingredient as most any with a few caveats.

Are potato peels good for compost?

Potatoes contain nutrients such as nitrogen, phosphorus, potassium, and magnesium. Composting potato peelings adds these nutrients to the pile and benefits the plants that will eventually be grown using that compost.

Can you compost tea bags?

Tea bags can be composted but they will break down faster and generate better soil in the end if they are mixed in with other scraps and materials as well. Incorporating food waste and scraps and other plant matter can help speed up the process and also help to break down the bags and string faster as well.

Should compost pile be in sun or shade?

You can put your compost pile in the sun or in the shade, but putting it in the sun will hasten the composting process. Sun helps increase the temperature, so the bacteria and fungi work faster. This also means that your pile will dry out faster, especially in warm southern climates.

How do I know when my compost is ready?

Generally compost is ready to be harvested when the finished product is a rich dark brown color, smells like earth, and crumbles in your hand. Some signs that it may not be ready include: Recognizable food content still visible. The pile is still warm.

What will make compost break down faster?

Shredding fallen leaves or adding shredded paper to your compost pile is a great way to speed up your composting process because smaller materials break down faster into nutrient rich compost. Pro tip: A ratio of 30:1, with more brown material than green material, is ideal.

Can too much compost hurt plants?

The slow release of nutrients from compost helps grow healthy plants. But compost that is not matured correctly might harm or even kill your plants. And, using too much compost can smother and kill plants.

Can I use compost to grow grass?

Using compost on grass, or topdressing, can be very beneficial. As always when you add organic matter to soil, it helps to improve the soil structure and add nutrients, giving all kinds of benefits.