Asparagus has been cultivated for more than two thousand years, prized for the tender shoots that return each spring from long-lived underground crowns. Once established, a healthy planting can remain productive for many years, making asparagus one of the garden’s most lasting investments.
Unlike annual vegetables, asparagus asks for patience at the beginning. Plants spend their first seasons building deep roots and strong crowns before regular harvest begins. Give them a permanent bed, fertile soil, good drainage, and time to establish, and they will reward that early care with one of the first harvests of spring.
Growing Guide
Timing
Start asparagus seed indoors about 10–14 weeks before the expected last spring frost, or sow outdoors once the soil has warmed and can be kept evenly moist. Seed-grown plants take longer to reach harvest size than purchased crowns, but they establish well when given steady care.
Transplant seedlings after the danger of severe frost has passed and the plants are sturdy enough to handle. Plant dormant crowns in early spring as soon as the soil can be worked. In mild climates, fall planting may also be possible where crowns have time to root before cold weather arrives.
Sowing & Starting
Soak seeds in room-temperature water for several hours before sowing to help soften the seed coat. Plant about ½ inch deep in individual cells or small pots filled with moist seed-starting mix. Keep the soil warm and evenly moist; germination may take two to four weeks.
Provide strong light once seedlings emerge. Grow them on until they are well rooted, then harden them gradually before transplanting. Space plants about 12–18 inches apart in rows 4–5 feet apart.
For crown planting, open a trench roughly 6–8 inches deep. Set crowns on small mounds of soil with the roots spread outward, then cover with a few inches of soil. Fill the trench gradually as the shoots grow until the bed is level.
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