Is this good enough for spuds?

[Tori]

My 'soil' (ha!) is lumps of solid clay concrete. Having beaten the living **** out of it whilst imagining my bosses head it now is slightly smaller lumps of clay concrete. But things seem to be growing! The shallots and onions seem to like it! Potatoes in , but not up yet. . . . I am waiting with baited breath. . . .

[Cosmo and Dibs]

Good luck!

I'm puzzled how I'm going to grow peas, beetroot, onions and carrots in it, though!