We've done the ostrich thing - what a neat experience (that I don't want to revisit). My DH has been reading up on aquaponics, thinking that since our soil is crap, maybe we can garden without any!
Careful! Once you do the aquaponics, you'll never go back to dirt!
I will admit to having one 4' x 8' grow bed set up with a mixture of coconut coir and potting soil in drilled plastic tubs for root crops like onions and garlic, but all the other grow beds are strictly gravel.
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