Can You Grow Brussels Sprouts in Zone 4b?
Quick Answer:
✅ Yes — Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.
✅ Yes
Brussels Sprouts grows well in Zone 4b
Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.
📅 When to Plant in Zone 4b
Start Indoors
Feb 18
Transplant Out
Apr 15
Last Sow Date
Apr 18
🌾 Harvest
Jul 14 – Oct 12
Based on Zone 4b's average last frost of mid-April and first frost of mid-October.
🌱 Growing Brussels Sprouts in Zone 4b
Start indoors 8 weeks before last frost. Plant in the sunniest spot. Needs a long season — start early. Frost improves flavour. Stake in exposed positions against autumn winds.
❄️ Frost Tolerant
🗺️ USDA Plant Hardiness Zones
Zone 4 is shown in
this colour
on the map below
2023 USDA Plant Hardiness Zone Map — public domain. USDA Agricultural Research Service
USDA zones run 1a–13b (26 half-zones). Each full zone above covers both the a and b half-zones. Browse all US zones →
Technical climate details for Zone 4b
- USDA Zone
- 4b
- Last Frost
- mid-April
- First Frost
- mid-October
- Frost-Free Days
- 183
- Brussels Sprouts Zone Range
- 3a – 9a
- Days to Harvest
- 90–180 days
Frequently Asked Questions
Brussels sprouts grow here with a long enough frost-free season — frost actually improves them.
Zone 4b is in USDA Hardiness Zone 4b with approximately 183 frost-free days per year.
Brussels Sprouts grows in USDA Zones 3a–9a.
Brussels Sprouts is a challenging crop best suited to experienced growers.