When and how do I plant asparagus crowns?

March to April, bare-root, in a sunny well-drained bed prepared the previous autumn with plenty of compost or well-rotted manure. Dig a trench 20 cm deep; make a central ridge; drape the crowns over the ridge with roots spread; cover. Plant 30–45 cm apart. Asparagus stays in the same bed for 15–20 years — site carefully and prepare the soil properly.

When can I start picking my asparagus?

Year one: no picking at all. Year two: very light picking for 4 weeks maximum. Year three onwards: full picking from late April to 21st June. The slow start is non-negotiable — cutting too early weakens the crowns and shortens the productive life of the bed.

Why must I stop picking on 21st June?

After mid-June, the plant needs to grow its full ferny foliage and rebuild crown reserves for next year. Cutting later than the longest day (21st June) weakens the crowns and shortens the productive life of the bed from 20 years to maybe 8–10. The rule isn't superstition; it's about leaving enough season for the plant to recover.

What's the difference between all-male F1 and older asparagus cultivars?

All-male F1 hybrids (Gijnlim, Backlim, Mondeo, Pacific 2000): only male plants in the seed, no energy wasted on producing seed; bigger spears; 30–50% more crop than older varieties; longer productive life. Older mixed-sex cultivars (Connover's Colossal, Martha Washington): smaller spears; female plants produce decorative red berries but waste energy on seed; still good but outperformed by F1s. Pay the extra for F1s.

How long does an asparagus bed last?

15–20 years productively with proper care (annual mulch, never cutting after 21st June, weed-free). Some old asparagus beds in walled gardens have cropped for 30+ years. Replace only when productivity drops below worthwhile levels; the crowns themselves can live 25+ years.

What's the asparagus beetle and how do I control it?

Crioceris asparagi — bright red-and-black adult beetle and grey-brown larvae that strip the ferny foliage in summer. Hand-pick adults and rub off the brown egg-clusters from stems. Encouraging ladybirds and parasitic wasps helps. Severe infestations weaken crowns over years; light damage the plants tolerate. Pyrethrum-based sprays are an organic-approved option for heavy infestations.

Espargo

Asparagus officinalis

Plant asparagus crowns from March to April, bare-root, in a sunny well-drained bed prepared the previous autumn with plenty of well-rotted manure. Asparagus is very hardy (RHS H7) and one of the longest-lived garden crops — 15–20 years of cropping from a single planting. The catch is the wait: don't cut any spears in year one (let the plants build up), light pick year two, full pick from year three onwards. Cut spears at ground level when 15–20 cm tall, from late April to mid-June only — stop cutting on the 21st June to let the plants build reserves for next year. All-male F1 cultivars (Gijnlim, Backlim, Mondeo, Pacific 2000) give larger spears than older mixed-sex varieties. The premium garden crop for patient growers.

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