Growing Borage in Zone 10b
Zone 10b has a year-round growing season. Borage can be planted almost any time with proper planning. Last frost: Jan 28. First frost: Dec 22.
Planting Calendar
Season: Jan 28 – Dec 22 (328 days)
When to Plant Borage in Zone 10b
Start Seeds Indoors: Dec 31
Start Borage seeds indoors around Dec 31 (4 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–14 days.
Transplant Outdoors: Jan 28
Transplant Borage seedlings outdoors after Jan 28. Wait until soil temperature reaches 50°F. Space plants at 18/sqft. Harden off plants for a week before moving outside.
Harvest: Mar 24
First harvest approximately Mar 24 (~55 days from planting). Continue harvesting until first frost (Dec 22).
Companion Planting
Borage in Other Zones
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13bFrequently Asked Questions
When should I plant Borage in Zone 10b?
Start Borage seeds indoors around Dec 31. Transplant outdoors after Jan 28. Expect first harvest around Mar 24.
What is the last frost date for Zone 10b?
The average last spring frost date for Zone 10b is Jan 28. The first fall frost averages Dec 22, giving a 328-day growing season.
Can I grow Borage in Zone 10b?
Yes. Borage needs 55 days to harvest. Zone 10b has a 328-day growing season, which is sufficient.
What is the best month to plant Borage in Zone 10b?
The best time to start Borage in Zone 10b is Dec. Begin seeds indoors around Dec 31, then transplant outdoors after the last frost date of Jan 28.
What companion plants grow well with Borage?
Good companion plants for Borage include Strawberries, Tomatoes, Squash, Cucumbers.
How long does Borage take to harvest?
Borage takes approximately 55 days from planting to harvest. In Zone 10b, expect your first harvest around Mar 24.
Plan Your Borage Garden
Track Borage from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Borage Growing Guide