I have another dumb question for a expert.

When you need a polinator for another tree. How far apart can the trees be from each other to cross polinate?? I have a tree now that needs a polinator, I planted two trees one died and now I dont really want to plant another tree where the second one died. I wanted to plant it about 100 - 200 feet cross ways from the first one. Is this to far away to cross polinate??

Thanks again for any help!