How to Grow Brussels Sprouts
Brassica oleracea (Gemmifera group)
A long-season brassica that turns fall frosts into sweet, nutty sprouts.
By the Plants by Zone Editorial Team · Reviewed June 1, 2026
About brussels sprouts
Brussels sprouts are a slow, cold-hardy brassica that produce dozens of mini-cabbage sprouts along a tall stalk. They need a long, cool season and actually taste best after several hard frosts, which convert their starches to sugar. Patience and steady care through summer pay off with a fall and early-winter harvest.
When to plant and harvest brussels sprouts
Timing is relative to your frost dates. Find your USDA zone for exact dates, or browse the month-by-month calendars.
Start seeds indoors
12–14 weeks before first fall frost
Transplant outdoors
Early to midsummer for a fall crop
Direct sow
Possible in early summer in long seasons
Harvest
Late fall into early winter, after frosts
How to grow brussels sprouts step by step
- 1
Count back from your first fall frost and start seeds so plants mature in cool weather.
- 2
Transplant into firm, rich soil and keep growth steady all summer.
- 3
Stake tall plants and keep moisture even as the stalk lengthens.
- 4
Remove yellowing lower leaves as the sprouts swell up the stalk.
- 5
For a uniform harvest, pinch out the top growing tip about a month before harvest.
- 6
Let several frosts hit the plant — they make the sprouts noticeably sweeter.
Common problems growing brussels sprouts
⚠ Loose, "blown" open sprouts
From heat or too much nitrogen late — grow into cool weather and keep feeding balanced and steady.
⚠ Cabbage worms and aphids
Cover with netting, hand-pick, or use Bt; aphids love to hide between the sprouts.
⚠ Few or tiny sprouts
The season was too short or warm — start earlier so the plant matures in the cool of fall.
✗ Keep away from
🧺 Harvesting brussels sprouts
Pick sprouts from the bottom of the stalk upward as they firm up to about an inch, twisting them off cleanly. Flavor improves dramatically after a few hard frosts, so a late harvest is worth the wait — you can even cut the whole stalk to store.
Brussels Sprouts: frequently asked questions
When are Brussels sprouts sweetest?＋
After several hard frosts. Cold converts their starches to sugar, so a late-fall or early-winter harvest tastes far sweeter and nuttier than a warm-weather one.
Should I top my Brussels sprout plants?＋
Pinching out the top growing point about three to four weeks before harvest helps the sprouts mature more evenly and quickly, which is useful in short seasons.
Grow brussels sprouts in your zone
See exactly when to plant and what else to grow alongside brussels sprouts, tailored to your USDA hardiness zone.
When to plant brussels sprouts by zone:
