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Harvesting Brussels sprouts

How to grow Brussels sprouts

All you need to know about growing Brussels sprouts, in our detailed Grow Guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Harvest
Harvest

Do Harvest in January

Do Harvest in February

Do Harvest in March

Do not Harvest in April

Do not Harvest in May

Do not Harvest in June

Do not Harvest in July

Do Harvest in August

Do Harvest in September

Do Harvest in October

Do Harvest in November

Do Harvest in December

  • Plant size

    75cm height

    50cm spread

  • Spacing

    60cm apart

    75cm between rows

Brussels sprouts are a popular vegetable in the cabbage (Brassica) family, and a staple part of the traditional Christmas lunch. Named after their popularity in Belgium, they are an excellent source of vitamins C and D, along with folic acid and dietary fibre. The vegetable also contains anti-cancer compounds called glucosinolates, which makes them a ‘super food’.

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Brussels sprouts are slow-growing, and can take up to 31 weeks to produce a crop. However, they crop from autumn through to spring, providing a valuable source of food in winter, when little else is available.

How to grow Brussels sprouts

Sow seeds in spring and plant out into fertile soil after all risk of frost has passed. Water regularly, feed with an organic nitrogen-rich fertiliser and stake in autumn to prevent wind rock. Harvest the sprouts as and when they are produced.


Where to grow Brussels sprouts

Potting on Brussels sprouts plants

Brussels sprouts do best in moist but well-drained, fertile soil, ideally which has been enhanced with well-rotted manure or compost. Grow in full sun for best results.


How to plant Brussels sprouts

Brussels sprouts seedlings ready to be planted out

For a successive harvest, sow seeds every fortnight from March to May, in pots or modular seed trays – one seed per module or small pot – and keep them in an unheated greenhouse or cold frame. After around four weeks (or when seedlings are large enough to handle), transplant them into individual pots of peat-free compost. Then, from May onwards, when plants are 10-15cm tall, harden them off before planting out into well-prepared soil enriched with well-rotted horse manure. Space plants 60cm apart with 75cm between rows. Firm the soil around the plants thoroughly, as Brussels sprouts do best in firm soil. Water well and continue to water throughout the growing season, particularly in periods of drought. If cabbage root fly is a problem in your area, fix cabbage collars around the base of the stems.


How to care for Brussels sprouts

Staking Brussels sprouts

Feed fortnightly with an organic nitrogen-rich fertiliser. Prevent weeds from competing with the plants by hoeing regularly. Stake plants in autumn and earth up around the roots to prevent them rocking in high winds. Remove any yellowing leaves from the plants as they can harbour disease.


Growing Brussels sprouts: pests and diseases

Large white caterpillar on brassica leaf

Blueish leaves that wilt in sunlight: are likely to be cabbage root fly. Look out for white maggots around the roots. Use cabbage collars around the base of the stems to prevent further attack.

Caterpillars eating the leaves: these are most likely the larvae of the large and small white butterfly (known as cabbage white butterflies). Gently transfer caterpillars to a sacrificial crop of nasturtiums, which are in the same family and will be readily eaten by both butterfly species.

Stunted growth: this is most likely caused by clubroot, a fungal disease that thrives in acid soil and can remain in the soil for several years, reinfecting newly planted plants. Adding ground limestone or calcified seaweed can help prevent its spread, however if you do find clubroot in your garden or allotment it’s best to avoid growing brassicas for up to nine years.

Blown sprouts: these are open sprouts as opposed to the tight ‘buttons’ you expect. Causes include poor and infirm soil.


How to harvest Brussels sprouts

Harvesting Brussels sprouts

Brussels sprouts ripen from the base of the stalk, so harvest them from the bottom as and when they are ready to pick. You can also cut the whole stalk as this will ensure the sprouts will keep for longer.


Advice on buying Brussels sprouts

  • There’s a huge variety of Brussels sprouts to choose from, with early varieties ready from August and later varieties cropping until March
  • Ensure you have the right growing conditions for the plants, and remember they need rich, fertile soil to grow well

Where to buy Brussels sprouts


Varieties of Brussels sprout to grow

Brussels Sprout ‘Brodie’ F1 Hybrid – the supermarket Brussels sprout, with no bitterness. Height x Spread: 75cm x 50cm

Brussels Sprout ‘Brilliant’ F1 Hybrid – firm buttons cropping from early autumn. H x S: 75cm x 50cm

Brussels Sprout ‘Bedford Fillbasket’ – bears large, firm sprouts with a good flavour. H x S: 75cm x 50cm

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