When to plant
Plant Asparagus viridis crowns in early to mid-spring once the soil has warmed and is workable. In mild climates, crowns may also be planted in early autumn to allow roots to establish before winter. Avoid planting in cold, wet soil.
Where to plant
Choose a sunny, sheltered position with at least 6 hours of direct sun daily. Asparagus viridis thrives in open borders, kitchen gardens and raised beds. Select a permanent location—crowns remain productive for many years and dislike being moved.
Preparing the soil
Loosen soil to 30–40 cm deep and enrich with compost or well-rotted manure. Asparagus viridis prefers fertile, sandy or loamy, free-draining soil. Improve heavy soils with grit and compost to ensure good drainage.
Preparing the plants
Inspect crowns to ensure they have firm, healthy roots. If roots appear dry, soak briefly in lukewarm water for 15 minutes before planting. Do not trim the roots unless damaged.
Planting the crowns
Dig a trench 20–25 cm deep and create a small ridge along the centre. Spread the roots over the ridge and position the crown so it sits 5–7 cm below the soil surface. Space crowns 30–45 cm apart with 1–1.5 metres between rows. Cover gently with soil and water thoroughly.
After planting
Keep soil evenly moist while roots establish. As shoots grow, gradually fill in the trench over several weeks until the soil is level. Apply a light mulch to conserve moisture and suppress weeds.
During growth
Water regularly, especially during dry spells. Avoid harvesting in the first year; allow the plant to build strength. Harvest lightly in the second year and fully from the third year onward. Remove weeds by hand to avoid disturbing the shallow roots.
After harvest / end of season
Stop harvesting when new shoots become thinner. Allow stems to grow into tall, ferny foliage through summer—this feeds the crown for the next season. Cut back the dry ferns to ground level in autumn and mulch lightly over winter.
Extra tips
Choose a permanent location, as asparagus dislikes transplanting. Mulch annually with compost to maintain soil fertility. For thicker spears, avoid over-harvesting and allow the plant to rest in summer.
