The premium perinnial has 5 or 6 brassicas in it. Some are designed to have increased summer palitibility, and some for hunting season. It' s always great to plant variety in brassicas, not just 1 seed. The premium perinnial does it right. You can frost seed in a brassica mixture such as Biologic' s Maximum to offer another year of the combo.

Jeff...U.P. of Michigan