Spring is the time to plant asparagus.
Carefully choose a site for planting asparagus, for a good bed of asparagus plants can remain prolific in the same site for many years. Though it can be started from seed it may take four years until harvest. Cover the crowns with two to three inches of rich, well-amended soil. As the fern grows, carefully backfill the trench with soil, being careful not to bury the ferns. Thirty to 40 plants will keep a family of four in asparagus most of the spring.