How to grow Brussels Sprouts
You might not like the cold weather, but Brussels sprouts do! Brussels sprouts grow best in cool climates with cold, even frosty winters. This cool climate vegetable is the most cold-hardy of its brassica relatives which includes broccoli, cabbage and kale.
You might have grown up being served grey, mushy brussels sprouts - yuck! But grow your own and you’ll discover just how delicious they can be lightly stir-fried, roasted or even thinly sliced raw in salads.
Top 4 steps to growing brussels sprouts
- Sow seeds or plant seedlings in mid to late summer for a winter harvest
- Cold weather, including frosts will produce the tastiest sprouts.
- Remove the lower leaves from each plant as the sprouts begin to form.
- Harvest brussels sprouts when the heads are still tightly formed.
- Brussels sprout seeds or seedlings
- If growing from seeds, a Scotts Osmocote Seed & Cutting Potting Mix
- Scotts Osmocote Compost Premium Soil Improver
- If growing in pots, a Scotts Osmocote potting mix
- Garden trowel
- Wildlife safe crop protection netting
Brussels sprouts grow well in full sun to part shade spot and they’ll tolerate a heavy soil. As they are top heavy when loaded with sprouts choose a spot that’s protected from strong winds.
Growing from seed
Brussels sprout seeds need to be sown in mid to late summer because the plants will need 100-160 days of growing before they are ready for harvest depending on the variety.
Sow seeds 7-10mm deep into punnets filled with Scotts Osmocote Seed & Cutting Potting Mix - plant 6-8 seeds per punnet - thinning out the weakest seedlings once they’ve all sprouted. Once the seedlings are about 15cm tall transplant them into your garden or pot allowing 60cm between seedlings.
Growing from seedlings
Planting in the garden
Plant seedlings into prepared soil, allow 60cm between seedlings and up to 1 metre between rows - depending on the variety.
Protect young seedlings from slugs and snails by sprinkling around Defender Snail & Slug Pellets. To protect young seedlings from the caterpillar of the cabbage moth (Plutella xylostella) and small cabbage white butterfly (Pieris rapae) use wildlife safe insect exclusion netting.
Lightly mulch the soil around plants after planting with an open mulch to retain moisture.
Planting in pots
Brussels sprouts can be grown in pots or planters - choose something that is at least 50cm wide and the same deep. If you’re limited with space look for some of the more compact growing varieties of brussels sprouts that can be planted closer together.
Fill your pot or planter with Scotts Osmocote Plus Organics Tomato, Vegetable & Herb Potting Mix ready for planting. Lightly mulch the soil around plants after planting with an open mulch to retain moisture.
As the Brussel sprouts form along the stem of the plant, remove any leaves between sprouts.
Harvest the sprouts closest to the ground first - snap them off or use a sharp knife to remove.
Pests & Diseases
Look out for the following pests and diseases attacking brussels sprout plants:
- Slugs and Snails - most likely to cause significant damage to young seedlings. Protect young plants by setting beer traps (saucers filled with beer) amongst seedlings or use Defender Snail & Slug Pellets.
- Caterpillars - the white flying adult cabbage moth (Plutella xylostella) and small cabbage white butterfly (Pieris rapae) they lay their eggs onto brussels sprouts (and other brassica crops) and the small green caterpillars feed on the leaves. To control these pests; remove the caterpillars by hand regularly, use insect exclusion netting over your crops to keep the flying moths/butterflies out or spray infested plants with Defender™ Pyrethrum Insect Spray.
- Aphids - aphids tend can attack the growing shoots of young brussels sprout plants. Remove some of the lower leaves to improve light and air circulation around the plants. Spray aphid infestations with Defender Pyrethrum Insect Spray if needed.