Good morning from Waco, TX. This is my first post here. I have a problem every year with nematodes on my tomatoes. I have been using marigolds, but I do not believe them to be the right variety, From what I have read this year is that it is the french marigolds. I have only found french double dwarf marigold seeds. Would any of you know if this particular variety fights nematodes? I plan on this year in addition to planting french marigolds I also plan on planting asparagus and chives. All three are said to help deter or stop nematodes.
edit: Oh, and nasturtiums.

Root knot nematodes are a problem here too.
I've read the same about marigolds.... Haven't found the specific variety to put it to a test.

I've read that planting grasses will deter nematodes... have tried winter plantings of rye... not totally convinced yet...

Several links to additional nematode info on this thread:

https://www.survivalistboards....

Hi Asclepius,
I occasionally have small problems with nematodes too. And they only bother my tomatoes and not any of my other crops. Interesting. So I have learned to always pull up the roots on all of my tomatoes at the end of the season so I can discover the problem before it gets out of hand. If it only infected one or two plants in a bed then I have just poured a big bucket of boiling water in the spot. That works. If it has effected a small group then I turned the dirt over every day for a week to dry them out and kill most of them, Then I solarized the whole area and left the plastic on it all winter to keep the area super dry. I only had them come back in the same spot the following year once and so I left the area fallow for the following summer. That worked too. And I always rotate my crops so I won't plant tomatoes there again for at least 3 years.

Anyway, I think these will give you the info you are looking for about marigolds. Happy gardening.

https://ipm.ucanr.edu/PMG/PEST...
https://www.patwelsh.com/pests...
https://www.lsuagcenter.com/pr...