When to Plant Brussels Sprouts in Zone 3
Brassica oleracea var. gemmifera
Last updated: Apr 25, 2026 · Sources: USDA, NOAA, Cooperative ExtensionZone 3 Planting Schedule
Start Indoors
Mar 27
6–8 weeks before transplant
Transplant Out
May 15
After last frost (May 15)
First Harvest
Aug 10
80–110 days after planting
Season Ends
Sep 12
Before first frost (Sep 15)
Quick Facts
Sunlight
☀️ Full Sun
Water Needs
💧💧 Moderate
Spacing
24 inches apart
Planting Depth
0.5 inch
Min Soil Temp
40°F
Germination
5–10 days
Days to Maturity
80–110 days
Frost Tolerance
Heavy frost tolerance
Soil pH
6.0–7.5
Difficulty
Moderate
Recommended for Zone 3
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Brussels Sprouts Schedule — All Zones
| Zone | Start Indoors | Transplant | Direct Sow | Harvest Start | Harvest End |
|---|---|---|---|---|---|
| Zone 3 | Mar 27 | May 15 | — | Aug 10 | Sep 12 |
| Zone 4 | Mar 22 | May 10 | — | Aug 5 | Sep 22 |
| Zone 5 | Mar 12 | Apr 30 | — | Jul 26 | Sep 24 |
| Zone 6 | Feb 25 | Apr 15 | — | Jul 11 | Sep 9 |
| Zone 7 | Feb 15 | Apr 5 | — | Jul 1 | Aug 30 |
| Zone 8 | Jan 30 | Mar 20 | — | Jun 15 | Aug 14 |
| Zone 9 | Jan 10 | Feb 28 | — | May 26 | Jul 25 |
| Zone 10 | Dec 23 | Feb 10 | — | May 8 | Jul 7 |
📚 Data Sources
Frost dates: NOAA Climate Normals 1991–2020, National Centers for Environmental Information.Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services — NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.