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Brussels Sprouts

A long-season crop for patient growers. Sow in spring and the reward is a stem of sprouts through the coldest months, sweeter after the first frost.

Waiting this month
First sprouts in 7–14 days

Difficulty

Brussels Sprouts

Out of season right now. The next sowing window opens in April.

Growing Calendar

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sow
Transplant
Harvest

This month: Jul

Plan ahead for this crop

  • Check growing conditions
  • Prepare for next stage

Sowing Guide

What you'd find on the seed packet

Sow Depth

1cm

Spacing

60–75cm

Germination

7–14days

Thinning

One plant per 60cm; crowded plants produce fewer, smaller sprouts

Grower's Note

Needs a genuinely long season, so sow as early as February under cover for the best results. Firm, well-consolidated soil produces the tightest sprouts.

Planting Out Guide

Best spaces, conditions and how to plant out

Plant Spacing

60–75cm

Best Grown In

Open ground, large raised beds

Conditions

Full sun. Firm, fertile soil. Add lime if acidic. Avoid recently-manured ground, which produces loose, blown sprouts.

Grower's Note

Stake tall plants in exposed positions before autumn winds arrive. Net against pigeons and cabbage whites from planting onwards.

Growing Stages

Approximate weeks from sowing to harvest

Sprouting

2wks

Seeds germinate and first leaves emerge. Keep warm and moist.

Establishing

10wks

Root system develops and plant builds structure. Pot on if needed.

Maturing

28wks

Plant reaches full size and begins producing. Harvest at peak.

Total~40 weeksfrom seed to harvest

Climate Control

Today

C

Humidity

%

Water

Every 2–3 days

Sunlight

6+ hours direct sun

Watch Out For

Cabbage white caterpillars strip leaves. Check undersides weekly from late spring and remove egg clusters and caterpillars by hand or net plants early

Pigeons strip whole plants bare in winter when little else is available, so netting is essential and should be in place before the first cold snap

Loose, 'blown' sprouts are usually caused by soft, recently-manured soil. Firm the ground well before planting and avoid feeding with high-nitrogen fertiliser

Pests & Problems

Full guide →

Cabbage White Caterpillars

Ragged holes in leaves

May–Sep

Whitefly

Tiny white flies lift off when disturbed

Jun–Sep

Clubroot

Swollen, distorted roots

Any time in acidic soil

What You'll Need

Equipment for growing brussels sprouts

Modular Seed Tray

96-cell for precision sowing

Fine Rose Watering Can

Gentle shower for seedlings

Bamboo Canes

Pack of 20 × 120cm

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Grown Organically

Every method in this guide works with natural systems — no synthetic chemicals, no shortcuts.

Read our approach

Common Questions

About growing Brussels Sprouts in the UK

Why are my Brussels sprouts loose and leafy instead of tight?

This is called 'blown' sprouts, usually caused by soft, recently-manured soil or overcrowded plants. Firm the ground well before planting, space plants a full 60–75cm apart, and avoid high-nitrogen feeds.

When should I harvest Brussels sprouts?

From October through to March, picking from the bottom of the stem upwards as the lowest sprouts mature first. Flavour actually improves after a frost, which converts some starch to sugar.

Do Brussels sprouts need staking?

Tall plants in exposed, windy positions benefit from a stout cane tied in loosely from autumn. Firm soil at planting time is the most important measure, since loose soil causes rocking and poor sprout development.

Why do pigeons target my Brussels sprouts?

Sprouts are one of the few green things left in the garden through winter, making them a magnet for hungry pigeons. Net plants securely before the first cold snap, since birds can strip a bed bare in a single visit.

Member guides

There's more to growing Brussels Sprouts than this guide covers.

A Garden Journal to log what worked, a personalised sowing planner in My Garden, and monthly reminders timed to the calendar.

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Each month: what to sow now, what to move on, and organic growing tips matched to UK conditions.

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  • What to harvest and how to store it