When should I plant Borage in Zone 4a?

Direct sow Borage outdoors around Apr 21. Harvest around Jun 15.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Yes. Borage needs 55 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

Zone 4a has cold winters and a moderate growing season. Timing is key for Borage in this zone. Last frost: May 5. First frost: Oct 1.

Outdoor

Harvest

Apr 21Oct 1

Season: May 5 – Oct 1 (149 days)

Zone4a

Last FrostMay 5

First FrostOct 1

Season Length149 days

Days to Harvest55

SunFull Sun

Frost ToleranceLight

Spacing18/sqft

Direct sow Borage seeds outdoors around Apr 21. Soil temperature should be at least 50°F. Space at 18/sqft.

First harvest approximately Jun 15 (~55 days from planting). Continue harvesting until first frost (Oct 1).

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Track Borage from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.