Brussels Sprouts

Brussels Sprouts

Brassica oleracea var. gemmifera

Start brussels sprouts indoors 7 weeks before your last spring frost, then plant out 2 weeks before your last spring frost. Space plants 24 in (61 cm) apart.

Photo: Emmanuel.revah, CC BY-SA 4.0 · source

When to plant

Timed from your frost dates, so it holds wherever you garden. Give yours and every step below becomes a date.

See the dates for your garden

Enter your average last spring frost and first fall frost. Every timing on this site turns into a calendar date. Not sure of yours? Your local extension service or a search for “last frost date” and your town will tell you; the app finds them from your location.

Last spring frost
First fall frost

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Optimal Indoor Start

From seedRecommended
  1. Start indoors7 weeks before your last spring frost
  2. Begin hardening off3 weeks before your last spring frost
  3. Plant out2 weeks before your last spring frost
  4. First harvestabout 100 days after planting out

Optimal Transplant

From seed
  1. Plant out2 weeks before your last spring frost
  2. First harvestabout 100 days after planting out

Optimal Fall Indoor Start

From seed
  1. Start indoorsabout 21 weeks before your first fall frost
  2. Begin hardening offabout 17 weeks before your first fall frost
  3. Plant outabout 16 weeks before your first fall frost
  4. First harvestabout 90 days after planting out

Optimal Fall Transplant

From seed
  1. Plant outabout 16 weeks before your first fall frost
  2. First harvestabout 90 days after planting out

Growing brussels sprouts

Spacing in the row
24 in (61 cm)
Between rows
36 in (91 cm)
Planting depth
1/4 - 1/2 inch
Sun
Full Sun
Soil
Well-drained, rich in organic matter
Germination
7-14 days at 65-75°F
Harvest season
Late Summer, Fall, Early Winter
Mature height
24-36 inches
Support
Stake
Life cycle
Biennial

Sow seeds 1/4-1/2 inch deep. Maintain consistent moisture for germination.

Watering. Consistent moisture, 1-1.5 inches per week. Avoid drought stress.

Neighbours

The companion chart →

Grows well beside

Keep apart from

Feeding

Seedlings
Diluted liquid fertilizer once true leaves appear.
Growing
Balanced granular or liquid fertilizer.
How often
Every 3-4 weeks during active growth.
Note
Prioritize nitrogen early, then balanced for sprout development. Avoid excessive nitrogen during sprout formation.

Your brussels sprouts, planned to the day.

Canopy turns these timings into dates from your own frost data, places every plant at its spacing on your garden map, and tracks it all the way to harvest.

Add brussels sprouts to your planting calendar →

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