Here in California where it does not rain in the summer, those of us not irrigating our trees, usually do depend on a winter cover crop being cultivated in when the ground can be worked. I usually use white or Dutch clover here because most of the others have a germination problem in our cool wet winter. Al

Do you then till this in?
I am assuming in the fall?

Just be sure stink bugs or TP Bugs aren't a problem in your area before using any broadleaf species as they often harbor these terrible pests. Clover is a broadleaf.