These perennial plants can grow up to 40 years old and only get larger each year. Crowns at full maturity can produce 9-13 spears! Follow this simple growing guide to learn the simple ways to plant asparagus to harvest for years to come. We offer both seed and crowns. While we don't always have crowns available, we always have our seed for sale. Our crowns are 2-year-old dormant plants that are only sold during the early Spring. Make sure to join the waitlist if it is out of stock to be notified when it becomes available.