I suppose it depends on how carefully one can use a tiny amount of space and practice appropriate agricultural techniques such as crop rotation so that nutrients are not continually used up in the soil and not replaced.
My mother used to say that a "weed" is only a plant growing where you don't want it. I think of dandelions as weeds but many people eat dandelion greens. My mother-in-law used to deliberately grow them.
Here in Essex County, New Jersey, USA we have very rocky compacted soil.
It takes practice and observation to understand what grows well here and how to ease the density of the soil so water doesn't "pond" at the surface.
I no longer use peat moss as it is a non-renewable resource.
Sand works well as do wood chips. Shredded paper works well too (although it's not pretty if you can see it) as long as the ink is non-toxic like soy-based ink. Newspaper shreads also work.
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