It's good for raised beds with protected bottoms. In regular soil, the nematodes just escape the heat by running down into the deeper sand and come right back up in my experience.

Didn't work for me. Papa Jim

I don't have nematodes (yet) but from I've read they could move in (if my source is right) so I want to be prepared (the Girl Scout in me). Because of space limitations and because it's easier/less expensive to amend container soil than ground level soil I grow all my veggies in containers except for eggplants and sweet potatoes. DG I'm interested in your comment above about protected bottoms. Do I need to put plastic sheeting under my containers?

I have wondered the same thing bea, but I'm pretty sure the answer is no. I have read somewhere that nematodes really prefer sand and will avoid organic soil such is found in containers. On the other hand I recall some one on the forum saying his nematodes could jump three feet! LOL

I have some raised beds heavily amended with organic matter with open bottoms that regularly get infected with nematodes over the summer. I try to reduce the damage they do by planting things like brassicas or other less tasty food. Solarizing may help for about 2 months, but it generally only reduces nematodes 6 inches from the top of the bed. If I plant stuff like peppers, eggplant, or swiss chard the nematodes will still find a way to the roots.

Bea,

If your pots have holes in the bottom, the nematodes can enter the pot. If the holes are on the side of your container you may be okay.