Apologies for repeating myself; I've asked this question before but no response. Will asparagus tap(?) roots penetrate down through stony ground and hardpan? In the place I'd like to plant, the topsoil - about 12" - sits over a stony zone on top of "hardpan," i.e. a very fine, compacted orange-red silt; it's not really clay, can be broken up and shovelled but I think it's bottomless.
There's a reference here to asparagus roots going down 10 feet:
https://forums2.gardenweb.com/discussion ... ts-go-down
I'm wondering how determined they'd be to get there; or how healthy the plant might be if they couldn't.