Growing Borage in Zone 4B

Borage is a cheerful, easy annual with brilliant blue star-shaped flowers that are edible, beautiful, and irresistible to bees.

Zone 4B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

Top Growing Tips

• Direct sow after last frost — doesn’t transplant well due to taproot
• Self-seeds aggressively; weed seedlings to control spread
• Freeze flowers in ice cubes for elegant cocktail garnishes
• Wilts in heat but recovers overnight — don’t overwater
• Plant near strawberries and tomatoes as a companion and bee attractor

Companion Planting

Good companions: tomatoes, strawberries, squash

Avoid planting near: No significant conflicts

Harvest Timeline

Harvest flowers anytime; pick regularly to extend bloom period

About Zone 4B

USDA Hardiness Zone 4B has an average last spring frost around May 1 and first fall frost around Oct 1. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.