150 to 180 days. Generally grown as a perennial in mild areas and as an annual where ground freezes. A good winter mulch may help overwinter in marginal areas. Space plants 4 to 6 feet apart. Harvest before bracts open. Cut the top one first, then the secondary ones as they mature. USDA Hardiness Zones 5 to 6. Approx. 600 seeds/oz.