Can You Grow Kohlrabi in Zone 3b?
Quick Answer:
✅ Yes — Kohlrabi thrives in your zone — it is one of the most productive cool-season crops for your climate.
✅ Yes
Kohlrabi grows well in Zone 3b
Kohlrabi thrives in your zone — it is one of the most productive cool-season crops for your climate.
📅 When to Plant in Zone 3b
Start Indoors
Apr 3
Transplant Out
May 1
Last Sow Date
Aug 2
🌾 Harvest
Jun 15 – Jun 30
Based on Zone 3b's average last frost of early May and first frost of early October.
🌱 Growing Kohlrabi in Zone 3b
Start indoors 4-6 weeks before last frost or direct sow. Thin to 6-8 inches. Harvest when bulbs are 2-3 inches diameter — bigger gets woody. Great for fall crops too.
🪴 Container: 5+ gal pot💧 Hydroponic OK❄️ Frost Tolerant
🗺️ USDA Plant Hardiness Zones
Zone 3 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 3b
- USDA Zone
- 3b
- Last Frost
- early May
- First Frost
- early October
- Frost-Free Days
- 153
- Kohlrabi Zone Range
- 3a – 9b
- Days to Harvest
- 45–60 days
Frequently Asked Questions
Kohlrabi thrives in your zone — it is one of the most productive cool-season crops for your climate.
Zone 3b is in USDA Hardiness Zone 3b with approximately 153 frost-free days per year.
Kohlrabi grows in USDA Zones 3a–9b.
Kohlrabi is beginner-friendly and one of the easier crops to grow.