I grew Shirley and gardeners delight on grafted plants last year. Did ok but got blight. My fault I think cos I sprayed and watered foliage. This year I know better, I think, and expect to grow them well. Getting sun gold and Shirley ths year, already ordered. Growth is more vigorous on grafted plants and should produce more fruit. But they are expensive. Worth it if I can keep them I disease free.