Growing Borage in Zone 3a
Zone 3a has harsh winters and a short growing season. Start Borage early indoors to maximize your harvest window. Last frost: May 22. First frost: Sep 12.
Planting Calendar
Season: May 22 – Sep 12 (113 days)
When to Plant Borage in Zone 3a
Start Seeds Indoors: Apr 24
Start Borage seeds indoors around Apr 24 (4 weeks before last frost). Optimal germination temperature: 70°F. Germinates in 5–14 days.
Transplant Outdoors: May 22
Transplant Borage seedlings outdoors after May 22. Wait until soil temperature reaches 50°F. Space plants at 18/sqft. Harden off plants for a week before moving outside.
Harvest: Jul 16
First harvest approximately Jul 16 (~55 days from planting). Continue harvesting until first frost (Sep 12).
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 3a?
Start Borage seeds indoors around Apr 24. Transplant outdoors after May 22. Expect first harvest around Jul 16.
What is the last frost date for Zone 3a?
The average last spring frost date for Zone 3a is May 22. The first fall frost averages Sep 12, giving a 113-day growing season.
Can I grow Borage in Zone 3a?
Yes. Borage needs 55 days to harvest. Zone 3a has a 113-day growing season, which is sufficient.
What is the best month to plant Borage in Zone 3a?
The best time to start Borage in Zone 3a is Apr. Begin seeds indoors around Apr 24, then transplant outdoors after the last frost date of May 22.
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 3a, expect your first harvest around Jul 16.
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