Also known as green sprouting broccoli. Calabrese is the name for the plant that grows green broccoli. The green-head broccoli that is usually found in shops and supermarkets comes from Calabrese seeds. Green broccoli has a much milder glavour than the purple and white sprouting types. F1 hybrid varieties produce large central head. Once harvested, a second drop of smaller individual spears produce where the leaf stem joins the main stem.