48 to 70 days to harvest. Annual. Very vigorous plants produce heavy crops of 3 to 4 inch wide, blue- green, central heads. Great side- shoot production. Can also be used as a sprouting broccoli. Broccoli is hardy and can be grown in zones three through ten, and can withstand frost. These organic seeds will grow and produce modestly sized heads with a large yield of side shoots. The tops of the Di Cicco broccoli heads have a soft green a purple color, and can be eaten in different ways, such as in a salad, or part of a stir fry.