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USDA Hardiness Zones

2, 3, 4, 5, 6, 7, 8, 9, 10, 11

USDA Zones 2-11 - Borage is grown as a hardy annual across all of these zones. It readily self-sows to return the following year, often behaving like a perennial.

Best Performance - Thrives in full sun and moderate temperatures, ideally between 60-80 degrees F. It grows quickly and produces the most abundant flowers in these mild conditions.

Northern Zones (2-6) - A perfect summer annual. Direct sow seeds after the last frost date. It will germinate and grow rapidly, flowering throughout the summer until the first hard frost of fall.

Hot Climate Zones (7-11) - Best planted in the fall for a spectacular and long-lasting winter and spring bloom. Spring plantings are also successful but the plant may bolt or struggle in the peak heat of mid-summer. Providing afternoon shade can help extend its season.

Soil Temperature - Germination is best in soil temperatures between 65-85 degrees F.

Growing Season - Borage is a very fast grower. It can go from seed to flowering in as little as 60-70 days. Succession planting every 3-4 weeks will ensure a continuous supply of fresh flowers and young leaves.

Learn more about USDA Hardiness Zones here

Planting Tips

When to Plant:
Borage has a long taproot and does not transplant well, so direct sowing is strongly recommended. Plant seeds outdoors after all danger of frost has passed in the spring. You can plant successive crops every 4 weeks to ensure a continuous harvest of young leaves and flowers.

Where to Plant:
Choose a location with full sun to light partial shade. Borage is not fussy and will tolerate a wide range of soil types, but it performs best in well-drained garden soil. Because it self-seeds so readily, choose a spot where you are happy to have it return each year.

How to Plant:

Direct Sowing: Sow seeds about 1/2 inch deep. Space seeds 4-6 inches apart, and then thin the seedlings to their final spacing of 12-18 inches apart to give them room to become bushy.

Watering: Water the seedbed well after planting and keep it consistently moist until germination, which usually occurs within 7-14 days.

Care & Maintenance:

Watering: Water young plants regularly. Once established, borage is quite drought-tolerant but will be more productive and have better-tasting leaves with consistent moisture.

Fertilizing: This plant thrives in average to poor soil and does not require fertilizing. Overly rich soil can lead to lush foliage with fewer flowers.

Self-Seeding: Borage will drop its seeds and new plants will emerge readily. To control its spread, simply pull up any unwanted seedlings or deadhead the spent flowers before they set seed.

Handling: Be aware that the leaves and stems are covered in a fuzzy, somewhat prickly texture. This texture softens significantly with cooking.

Harvesting: Harvest flowers as soon as they open for the best flavor. Pick young leaves when they are tender; older leaves can become coarse and overly fuzzy. Harvest frequently to encourage the plant to produce more.

Borage Seeds - Borage officinalis

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