Can You Grow Kale in Zone 4a?
Quick Answer:
✅ Yes — Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.
✅ Yes
Kale grows well in Zone 4a
Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.
📅 When to Plant in Zone 4a
Start Indoors
Mar 28
Transplant Out
Apr 25
Last Sow Date
Jul 22
🌾 Harvest
Jun 19 – Jul 9
Based on Zone 4a's average last frost of late April and first frost of early October.
🌱 Growing Kale in Zone 4a
Sow indoors 4-6 weeks before last frost or direct sow in late summer for fall harvest. Harvest outer leaves to keep the plant producing. Cold-hardy varieties survive winter in Zone 7+.
🪴 Container: 3+ gal pot🏠 Indoor Viable💧 Hydroponic OK❄️ 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 4a
- USDA Zone
- 4a
- Last Frost
- late April
- First Frost
- early October
- Frost-Free Days
- 163
- Kale Zone Range
- 2a – 9b
- Days to Harvest
- 55–75 days
Frequently Asked Questions
Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.
Zone 4a is in USDA Hardiness Zone 4a with approximately 163 frost-free days per year.
Kale grows in USDA Zones 2a–9b.
Kale is beginner-friendly and one of the easier crops to grow.