Can You Grow Kale in Zone 9b?
Quick Answer:
✅ Yes — Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.
✅ Yes
Kale grows well in Zone 9b
Kale grows exceptionally well here — it is one of the most cold-tolerant vegetables available.
📅 When to Plant in Zone 9b
Start Indoors
Jan 1
Transplant Out
Jan 10
Last Sow Date
Oct 11
🌾 Harvest
Mar 6 – Mar 26
Based on Zone 9b's average last frost of mid-January and first frost of late December.
🌱 Growing Kale in Zone 9b
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 9 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 9b
- USDA Zone
- 9b
- Last Frost
- mid-January
- First Frost
- late December
- Frost-Free Days
- 348
- 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 9b is in USDA Hardiness Zone 9b with approximately 348 frost-free days per year.
Kale grows in USDA Zones 2a–9b.
Kale is beginner-friendly and one of the easier crops to grow.