For this reason, it is important to protect the asparagus' fern-like foliage from insects, disease, and other injury. Spears should not be removed from plants during the first two growing seasons in their permanent location. These are available through major seed distributors. Asparagus is most productive on deep, well-drained, sandy loam soils. The plants lose vigor, become more susceptible to root rot, and die in poorly drained areas or following prolonged high rainfall.
Medium fertility is best it produces a balance between top growth and root growth.
The Horticultural Standards of the American Association of Nurserymen are often used to identify the size of crowns. 3-year crowns may be used. Larger crowns have more vigor. It is difficult to get commercial crowns free of Fusarium root rot. One way to avoid Fusarium is to plant disease-free seed and grow your own crowns or seeding transplants.