Raised beds against cinderblock walls?
My yard, like 99.9% of the yards in Arizona, is surrounded by a 6' high concrete block wall (the variety with the 20' x 4" deep 'wall' sections between 8" 'columns').
I'm putting in some 18" high raised beds and the back of these beds will end up against the block wall. This is probably not such a good thing since I'm not certain the wall can handle the weight of the dirt, and then there's the moisture-seep/discoloration problem that my neighbor will likely end up with.
To alleviate these problems, my plan has been to erect a separate free-standing 18" high wall at the back of the bed (also probably out of concrete block) to support the weight and to prevent direct contact of the dirt with the old wall.
This solution sounds like it might have it's own issues (not the least of which is cost), so I'm wondering if anyone has any better ideas?