when should you plant asparagus
1 Asparagus is planted in early spring as soon as the soil can be worked. 2  The plant is grown from âcrownsâ (1-year-old plants). 3  Eliminate all weeds from the bed, digging it over and working in a 2- to 4-inch layer of compost, manure or soil mix.4  Dig trenches of about 6 inches wide and 6 to 12 inches deep.sparagus is a perennial bulb and stem vegetable that greets us every spring. It may take 2 to 3 years to get started and produce, so patience is needed! But then the plant can be productive up to 20 years, so we think it's worth the wait. Asparagus has male and female plants, with the female plants producing berries.