Properly established and cared for, asparagus plantings will produce good crops over a 15 - to 20- year period. Here are the latest recommendations for planting, harvesting and before- and after-harvest care.
"How To Grow Asparagus,"
Iowa Farm Science: Vol. 13
, Article 5.
Available at: https://lib.dr.iastate.edu/farmscience/vol13/iss10/5