Brussels Sprouts
Brassica oleracea var. gemmifera
A hundred days of nothing much, then a stalk of sprouts after the first hard frost.

Count backwards from frost
Plant in early summer to harvest in late autumn and winter. Sprouts formed in warm weather are loose, leafy and bitter; those maturing in the cold are tight and sweet. Start seed in late May or June, transplant in July, and expect nothing worth eating until late October.
Firm soil and support
Plants reach three feet and get top-heavy. Plant deeply, firm them in hard, and stake on exposed sites. Loose soil plus a wet autumn gale means the whole plant goes over and the sprouts sit in mud.
Feeding and water
A long season and a big plant makes a heavy feeder. Side-dress at three weeks and again at six to eight, then ease off nitrogen in early autumn so the sprouts firm rather than staying leafy. Never let them dry out; drought gives loose sprouts.
Topping
Pinching out the growing tip in early autumn, four to six weeks before you want to harvest, stops the plant extending and pushes it to finish the sprouts it has. It evens up the stalk so it matures more or less together. Skip it if you would rather pick gradually over a longer window.
Strip the lower leaves
As sprouts develop, remove yellowing lower leaves. It improves airflow, makes picking easier and directs resources into sprouts rather than tired foliage.
Harvest from the base up
Sprouts mature from the bottom of the stalk upward. Twist or snap the lowest ones once firm and about an inch across, working up over several weeks. Loose open sprouts usually mean heat, drought or excess nitrogen.
Aphids are the worst problem
Cabbage aphids hide inside the sprouts where you cannot wash them out, which ruins the crop rather than just marking it. Check from late summer, spray water or insecticidal soap into the crowns, and use row cover early in the season. Cabbageworm and looper also apply.
Storage
They hold on the stalk in the garden through hard frost and into winter, which is the best storage available. Cut whole stalks to keep them fresh a week or two indoors. Loose sprouts keep about a week in the fridge and freeze well blanched.
- Days to harvest
- 90-110
- Start indoors
- Late May-Jun
- Spacing
- 24 in
- Row spacing
- 30-36 in
- Sun
- Full
- pH
- 6.0-7.0
- Harvest
- After frost
- Water
- Steady, 1.5 in/week