When to plant brussels sprouts 🥬
Brussels Sprouts takes 90–110 days to mature, spaced 24" apart at 0.5" deep. Start indoors and transplant for the longest harvest.
Planting dates by USDA zone
| Zone | Start indoors | Transplant | Harvest |
|---|---|---|---|
| Zone 3 | April 13 – April 27 | June 22 – July 20 | September 14 – October 12 |
| Zone 4 | April 3 – April 17 | June 12 – July 10 | September 4 – October 2 |
| Zone 5 | March 20 – April 3 | May 29 – June 26 | August 21 – September 18 |
| Zone 6 | March 4 – March 18 | May 13 – June 10 | August 5 – September 2 |
| Zone 7 | February 19 – March 4 | April 29 – May 27 | July 22 – August 19 |
| Zone 8 | February 2 – February 16 | April 12 – May 10 | July 5 – August 2 |
| Zone 9 | January 4 – January 18 | March 14 – April 11 | June 6 – July 4 |
| Zone 10 | December 19 – January 2 | February 27 – March 26 | May 21 – June 18 |
Dates are averages — adjust ±1–2 weeks for your microclimate. Need your exact dates? Enter your zip code below.
Get your personalized brussels sprouts planting dates
Care tips
- Long season — plan for a fall harvest.
- Pinch top of plant 4 weeks before harvest for even sprouts.
- Sweeter after a light frost.
Good companions
Onion, Thyme, Beet.
Read more: Companion planting chart for vegetables
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Frequently asked questions
When should I start brussels sprouts seeds indoors in zone 5?▾
In USDA zone 5, start brussels sprouts seeds indoors between March 20 and April 3 — that's 4–6 weeks before the average last frost (May 1).
When should I start brussels sprouts seeds indoors in zone 6?▾
In USDA zone 6, start brussels sprouts seeds indoors between March 4 and March 18 — that's 4–6 weeks before the average last frost (April 15).
When should I start brussels sprouts seeds indoors in zone 7?▾
In USDA zone 7, start brussels sprouts seeds indoors between February 19 and March 4 — that's 4–6 weeks before the average last frost (April 1).
When should I start brussels sprouts seeds indoors in zone 8?▾
In USDA zone 8, start brussels sprouts seeds indoors between February 2 and February 16 — that's 4–6 weeks before the average last frost (March 15).
When can I transplant brussels sprouts seedlings outdoors?▾
Transplant brussels sprouts seedlings about 4–8 weeks after your average last spring frost. In zone 6 that's around May 13–June 10.
How long does brussels sprouts take to grow?▾
Brussels Sprouts typically takes 90–110 days to mature, with harvest beginning roughly 16–20 weeks after the last spring frost.