Gardening - Vegetables: Selecting & Planting
Asparagus (Asparagus officinalis) is a member of the lily family. It has been grown for more than 2,000 years and is quite popular in the home garden today. Asparagus is an excellent source of vitamin A and contains significant levels of calcium, phosphorus, riboflavin, thiamine and Vitamin C.
"SP291-R-Growing Asparagus in Home Gardens," The University of Tennessee Agricultural Extension Service, SP291R-2.5M-2/99 E12-2015-00-046-99, http://trace.tennessee.edu/utk_agexgard/46