When should I plant Borage in Zone 3a?

Direct sow Borage outdoors around May 8. Harvest around Jul 2.

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.

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

Outdoor

Harvest

May 8Sep 12

Season: May 22 – Sep 12 (113 days)

Zone3a

Last FrostMay 22

First FrostSep 12

Season Length113 days

Days to Harvest55

SunFull Sun

Frost ToleranceLight

Spacing18/sqft

When to Plant Borage in Zone 3a

Sow Seeds Outdoors: May 8

Direct sow Borage seeds outdoors around May 8. Soil temperature should be at least 50°F. Space at 18/sqft.

Harvest: Jul 2

First harvest approximately Jul 2 (~55 days from planting). Continue harvesting until first frost (Sep 12).

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