Can You Grow Borage in Zone 9b?
Borage grows well in Zone 9b
Borage grows easily anywhere in your zone — direct sow and let it self-seed for years of free plants.
📅 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 Borage in Zone 9b
Direct sow after last frost — hates transplanting. Self-seeds so aggressively you plant it once and it returns every year. Great companion plant for tomatoes and strawberries. Harvest flowers daily to encourage more blooms.
🗺️ 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
- Borage Zone Range
- 2a – 11b
- Days to Harvest
- 50–60 days