How to Grow Asparagus

Asparagus is a long-term investment crop — it takes 2–3 years to establish, but once mature, it produces tender spears every spring for 15–20 years. It thrives in well-drained, sunny soil and rewards patience with some of the earliest and tastiest harvests of the year.

🗓️ Month-by-Month Growing Guide (UK)

January

🧤 Plan & Prepare

• Choose a sunny, sheltered spot — asparagus dislikes wind and waterlogging.

• Avoid sites where potatoes or other deep-rooted crops recently grew (risk of pests).

• Order asparagus crowns (1-year-old roots) from reputable suppliers.

• Start clearing and preparing the bed: remove weeds, dig deeply, and incorporate well-rotted manure or compost.

February

🌿 Soil Preparation

• As soil dries, finish preparing the asparagus bed.

• Fork in organic matter and add some grit or sand if soil is heavy.

• Create raised beds if drainage is poor.

• Check crowns have arrived — keep them cool and dry until planting time.

March

🌾 Planting Month

• The best time to plant asparagus crowns.

• Create a trench:

  • 30 cm (12 in) wide, 20 cm (8 in) deep.

  • Make a central ridge along the base of the trench.

  • Space trenches about 45 cm (18 in) apart.

• Place crowns on top of the ridge, roots spread out, 30–45 cm apart.

• Cover lightly with 5 cm of soil and water well.

• Mark rows clearly.

April

🌱 Early Growth

• Spears begin to emerge from planted crowns.

• Do not harvest this year — allow all shoots to grow and feed the plant’s roots.

• Keep the bed weed-free (hand-weed gently).

• Water in dry spells.

May

🌿 Mulch & Feed

• Apply a thick mulch of compost or straw to retain moisture and suppress weeds.

• Feed monthly with liquid seaweed or organic fertiliser.

• Tie in tall ferny growth if it becomes windblown.

June

🌾 Maintenance

• Continue feeding and watering.

• Keep the bed tidy and free from weeds.

• Avoid damaging shallow roots when weeding.

• If slugs appear, use organic control methods (beer traps or wool pellets).

July

🌸 Fern Growth

• Plants are now growing tall, feathery ferns — this is good!

• These fronds recharge the roots for next year’s crop.

• Water regularly in dry weather and keep weeds under control.

August

☀️ Summer Care

• Allow ferns to grow naturally.

• Remove any yellowing or diseased stems.

• Give a final feed before autumn sets in.

• Watch for asparagus beetle — pick off adults and larvae by hand.

September

🍂 Late Season

• Ferns will start to turn yellow — that’s normal.

• Stop feeding and reduce watering.

• Let foliage die down naturally to feed the crowns.

October

🌾 Cutting Back

• Once foliage is completely brown, cut it down to 5 cm (2 in) above the soil.

• Mulch the bed with compost or well-rotted manure to protect the crowns.

• Keep the bed free from weeds and debris.

November

🍁 Winter Rest

• The bed goes dormant.

• Add another layer of mulch if frost is expected.

• Avoid walking on the bed when it’s wet or frozen.

December

❄️ Plan & Protect

• Nothing to do but keep it tidy.

• Check for frost damage or heaving of crowns.

• Order extra crowns if you want to extend your bed next spring.

🌿 Ongoing Care (Years 2–3 and Beyond)

• Year 2: Allow spears to grow freely again — no harvest yet.

• Year 3: Begin harvesting lightly — take a few spears from each plant for about 2 weeks.

• Year 4+: Full harvest for 6–8 weeks (mid-April to mid-June).

• Always stop harvesting by late June to let ferns regrow and feed the roots.

🌼 Key Growing Tips

• Soil: Free-draining, sandy or loamy, pH neutral to slightly alkaline.

• Sun: Full sun, sheltered from wind.

• Watering: Regular during dry spells, especially early growth.

• Feeding: High-potash feeds in summer.

• Mulching: Annual top-up in spring or autumn.

• Lifespan: Productive for 15–20 years once established.

🌤 Tip of the Season

“Patience pays — give asparagus three years to settle, and it will reward you for decades.”