Just wondering if anyone would know--how close can various edible plants be placed together without them competing for water and root space? I'm think of putting in an edible garden (in addition to all my raspberries and blackberries) and was thinking of putting in some fruit trees along the edges (pear and apple probably) as well as something shorter (like blueberries) near their base, while still being able to pick the fruit trees. The area gets full sun all year long, though the trees will obviously create some shade.
Any tips for planning an edible garden? Thanks.