Tomatoes are very strong self pollinators. You could probably grow them
right next to each other and never see a cross.
I assume you will grow several plants of each kind. Save seed from a
couple of the best plants each year. It's easy to save way more seed
than you need. It's easy to keep seed for several years. Plant the fresh
seed every year but keep the older seed on file for a few years. If you
ever get unlucky and get a cross, you can go back to the older seed
(next year) and not loose the variety.
Of course you could just buy new seed if that happened but what fun is
that? Besides, by taking seed from only your best plants, you might fine
tune the variety to your conditions and end up with something slightly
better over time.
As an alternate plan, if you do get some off type plants, simply don't
save the seeds from those plants. Unless you grow only a very few of
each variety, I can't imagine you would not always get some pure type
plants. As I said, you'll probably never have trouble with them crossing
in the first place.

Steve

kenny wrote:
I have the book Seed to Seed by Suzanne Ashworth and am going to start
saving seed from my garden this year. I am ordering only heirloom
open pollinated seed to start with.
I am unsure about the tomatoes if I can grow several types and not
have them cross. The book says tomatoes are inbreeding plants and
that seed savers should have no problem with cross pollination if you
grow one currant tomato or one potato leaved variety if the styles
are covered by the anther tubes.
I want to plant Brandy wine and Black from Tula and Amish Paste all in
the same 40' x 100' area. I will probably put one type on each end
and one in the middle but just want to make sure since I am going to
be saving these seed for years to come.
Thank you
Kenneth
From Lufkin TX


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