...proximity? We're wanting to grow berries in our back yard, but I heard somewhere that you have to be careful about proximity of one variety to another because they can harm each other (I think it was that one type might carry a bug that's harmful to the other or something). Tried looking that up and can't find any confirmation of such. We want to plant blackberries, blueberries, raspberries and strawberries - is there a minimum distance that each variety can be next to the other, or is growing space the only limiting factor? Thanks!