45 days. Actually a relative to turnips but the flowering heads are similar in shape to classic broccoli.  Broccoli Raab is known by many names and is commonly used in the cuisines of Southern Italy.  The flavor has been described as "nutty, bitter, and pungent."  High in vitamins A, C, and K as well as potassium, calcium, and iron.  Harvest the leaves when they are between 10 and 15 inches high for best flavor.  Approx. 9,000 seeds/oz.