Can You Grow Celeriac in Zone 9b?
Celeriac grows well in Zone 9b
Celeriac can work in your zone with an early indoor start — it needs all the growing season you have.
📅 When to Plant in Zone 9b
Based on Zone 9b's average last frost of mid-January and first frost of late December — frost can arrive earlier or later in any given year, so check your local forecast before you transplant.
🌱 Growing Celeriac in Zone 9b
Start indoors 10-12 weeks before last frost — one of the earliest indoor starts of the season. Transplant after all frost risk. Keep consistently moist. Trim side roots as bulb develops. Harvest before hard freeze.
🗺️ USDA Plant Hardiness Zones
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
- Celeriac Zone Range
- 3a – 9b
- Days to Harvest
- 110–120 days