On May 4, 8:44*pm, Frank Reid © 2010 wrote:

'bout how far apart?
Frank Reid

No more than a hundred feet. Chestnuts rely on insect
pollinators.....plant them too far apart and you get no seed. 50-60
feet is better. Still allows plenty of room for each individual tree
to grow. But keep in mind that not every tree will necessarily
survive to adulthood. Tree farmers usually plant more trees closer
together and then "thin" (cull) to allow the best specimens to
prosper. You've got about twenty seeds coming. Unless you're
planning a large grove you should be able to plant relatively close
and then thin to final specs. And if you ARE planning a large grove
(or a small forest) I can send more seed next year. I can also very
likely get my hands on some Chinese chestnuts.....you can start your
own hybridizing project.

Good luck!

giles