55-60 Days in Spring, 65-70 Days in Fall to maturity Brassica oleracea var. botrytis. Cauliflower Seeds - Song TJS-65. Annual, Hybrid. This is a non-GMO seed that has a yellowish head, loose florets with light green and long stems. 4-5lbs. Good for planting in spring, summer, and fall. Harvest after the florets have elongated and curds start to separate. ~ 8,900 seeds per oz.