-=> Quoting Sandra Peake to Marilyn Boissoneault <=-
SP> The Pot marigold is actually calendula, a great little flower for
SP> the garden and herbalists. I think the French marigolds are the main
SP> defense against nematodes - let me check.  Oops! I was wrong -it's
SP> the tall Africans that produce the inhibiting effect. And
SP> solarization works well also.
I've never grown the pot marigold, but have seen it listed.  I
only tried solarization once, but did it wrong. I didn't have all
the "rules" at the time. The main thing I did wrong was till the
ground after I took the plastic off!  You are NOT supposed to do
that because you are apt to till up nematodes from deeper in the
ground.  I don't have near the problem with nematodes I used to.
I continually add organic matter to the soil which helps.  I also
have used a product called clandosand. It is an organic product
containing chitin which is ground up shell from crabs i believe.
It's expensive, but seemed to really slow the nematodes down. It
works by promoting the soil dwelling microorganisms that feed on
chitin and alos on  nematode eggshells that also contain chitin.
I used it for several years and haven't needed it lately. It's
only drawback is it's high in nitrogen and you have to wait
awhile before planting or you have way too much nitrogen and
could burn your plants.
SP> Not in my soil. I've only ever had seedling marigolds in a wet year.
SP> :-) Even dill isn't very prolific at self seeding most years.
OH dill sprouts here and there. I haven't had to plant dill in
years. It always comes up somewhere! 
Marilyn
... Don't let middle-age get you down, it passes really fast!
___ Blue Wave/DOS v2.30
--- Alexi/Mail 2.02b (#10000)
---------------