Imperial Star will produce well-developed artichokes the first year. Plants become 1 1/2-3′ tall and have an open growth habit. Each typically produces 1-2 primary buds, which average 3-4″ in diameter, and 5-7 smaller secondary buds. Perennial in Zone 7 and warmer; otherwise treat as an annual. Protect crowns in winter. 85 days from transplant. OP
Care: Plant 3′ apart in rows 3′ apart in full sun. Harvest before flowers start to open. In October, cut back to 8-10″ from ground and mulch with straw or leaves. Uncover in April.