Jersey Supreme Asparagus Crowns 25 Crowns per order 2 year old Asparagus crowns, all male crowns for best spear growth USDA Hardiness zones 3-8 Your asparagus plants will produce for well over 15-20 years.  Harvest for 1 week a year after planting, 2 weeks of harvest in second year, 3 weeks of harvest in third year, and full harvest there after.  Plant your asparagus today and enough fresh cut asparagus for years to come!