No-dig garden on old building site
Just came across this site- excellent!
so, i knocked down an old building leaving a sandy square about 3m x 3m.
unfortunately, there is some old building material, for example, concrete bits, wood and maybe a small bit of asbestos that are too hard to find from asbestos sheeting (but not much, if any) still mixed into the sand.
I have covered this with black plastic.
Would this still be suitable for a no-dig garden? That is, start on top of the black plastic?
thanks for any comments. Adrian