Posted: 18/09/2015 at 09:18
Will you have access to plenty of well rotted farm yard manure?
That is the best stuff for turning clay into workable loam. Raised beds will help with drainage for shallow rooted plants. You have to be careful it doesn't form a pan of clay at the bottom which stops drainage. I am on a slope and the terraced veg beds contain very sandy soil with underlying clay. If it rains heavily, the rain goes straight through, hits the clay level,runs downhill and comes up in the greenhouse where it sits in a big puddle. The greenhouse frog likes it though.