The local community garden, an old set of tennis courts over a hectare or two, has one large area in the SW corner that is at the bottom of a hill which wraps right round the western side of the garden. The old courts were cut into this hill. It is much 'wetter' in that area I guess because of water draining from the hill. In heavy rain it's a shallow pond. They have in fact decided to build a pond there. The whole area is heavy clay and the area was ripped before any work began. What herbs/fruits/vegetables would enjoy such conditions? Cranberries and celery come to mind. Others?