When should I plant Borage in Zone 3b?

Direct sow Borage outdoors around May 1. Harvest around Jun 25.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Borage in Zone 3b?

Yes. Borage needs 55 days to harvest. Zone 3b has a 130-day growing season, which is sufficient.

Growing Borage in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Borage early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.

Planting Calendar

Outdoor

Harvest

May 1Sep 22

Season: May 15 – Sep 22 (130 days)

Zone3b

Last FrostMay 15

First FrostSep 22

Season Length130 days

Days to Harvest55

SunFull Sun

Frost ToleranceLight

Spacing18/sqft

When to Plant Borage in Zone 3b

Sow Seeds Outdoors: May 1

Direct sow Borage seeds outdoors around May 1. Soil temperature should be at least 50°F. Space at 18/sqft.

Harvest: Jun 25

First harvest approximately Jun 25 (~55 days from planting). Continue harvesting until first frost (Sep 22).

Companion Planting

✅ Strawberries✅ Tomatoes✅ Squash✅ Cucumbers

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 13b

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