We're making a vegetable patch in the garden of our new house. The area we've identified has been turned over from turf; quite a clay-ey soil, seems to have had some sand or organic matter mixed in in places, but the garden used to be a builders waste ground and has some bits of hardcore about a foot down. Always jarring when you are digging!
Do we need to build it up; like a raised bed? If so, what's best to use? Top soil or compost?
Many thanks.