Table of Contents
As the gardening season comes to a close, a common question arises: can you compost tomato plants? The answer is a resounding yes, but with some very important exceptions, especially when it comes to diseased plants. Composting is a fantastic way to recycle garden waste and create nutrient-rich soil for the following year, but it’s crucial to know what can and cannot go into your compost pile to avoid inadvertently spreading problems.
What to Do with Old Tomato Plants?
At the end of the season, when your tomato plants have finished producing, the best thing to do with healthy, disease-free plants is to compost them. They are a valuable source of organic matter that will enrich your compost pile. However, if your plants are showing any signs of disease, such as blight, they should not be added to a typical home compost pile.
Are Rotten Tomatoes Good for Compost?
Yes, rotten tomatoes are excellent for compost. They are rich in nitrogen and moisture, which helps to accelerate the decomposition process. However, be aware that the seeds from rotten tomatoes may survive the composting process and sprout as “volunteer” tomato plants in your garden the following year.
Can You Compost Dead Tomato Plants?
Absolutely. Dead, dried-out tomato plants are a great source of “brown” or carbon-rich material for your compost pile. Just be sure to break them up into smaller pieces to help them decompose faster.
Want the Ultimate Guide to Off-Grid Living?

If you love the self-sufficient lifestyle, this is the only guide you’ll ever need. Learn how to generate your own power, secure your water supply, and become truly independent. No fluff, just actionable plans.
➡️ Check out The Self-Sufficient Backyard and start your journey today!
Can Whole Tomatoes Go in Compost?
While you can put whole tomatoes in your compost, it’s not the most efficient method. Whole tomatoes will take a long time to break down. For faster decomposition, it’s best to chop them up before adding them to the pile.
Can You Put Moldy Tomatoes in Compost?
Yes, moldy tomatoes are perfectly safe to add to your compost pile. Mold is a natural part of the decomposition process, and the microorganisms in your compost pile will have no trouble breaking it down.
Can You Reuse Compost from Tomato Plants?
Yes, you can and should reuse the compost you make from your tomato plants. This nutrient-rich “black gold” is an excellent soil amendment for all of your garden plants, including next year’s tomatoes. However, it is crucial that you only compost healthy, disease-free tomato plants. If you have any doubts about the health of your plants, it’s best to err on the side of caution and dispose of them in the trash rather than your compost.
Conclusion
Composting tomato plants is an excellent way to close the loop on your gardening season, turning this year’s garden waste into next year’s “black gold.” As long as your plants are free from diseases like blight, they can be a valuable addition to your compost pile. By being mindful of what you add to your compost, you can ensure that you are creating a healthy and nutrient-rich soil amendment that will benefit your entire garden.