What's your question? Ask

Q.Can You Harvest Seeds To Replant From A Tomato That Had Root Knot Nematode?

Zone Fort Worth, Texas Zone 8a | Anonymous added on February 13, 2026 | Answered

If I have harvested seeds from tomato plants that were found to have RKN, would it be ok to plant those seeds for the next season, or do the RKN spread via fruit? Is it safe to use these seeds?

A.Answers to this queston: Add Answer
GKH_Susan
Certified GKH Gardening Expert
Answered on February 20, 2026

It is best not to use seeds from a plant that had any diseases, parasites, or disorders. Especially since your plants experienced RKN, you should use seeds the next year that are resistant to RKN. Also, do not plant tomatoes or any other plant susceptible to RKN in a garden immediately following an infestation. Some people plant French marigolds in the area, then till them under in a couple of months. Soil solarization or leaving the soil fallow for a time also can help. Here is more:

https://www.gardeningknowhow.com/edible/vegetables/tomato/tomatoes-nematodes.htm

https://www.gardeningknowhow.com/plant-problems/pests/insects/root-knot-nematode.htm

Was this answer useful?
00

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

OK