Borage (Borago officinalis) is a sprawling Mediterranean annual that earns its nickname 'starflower' from its striking blue star-shaped flowers with white centers. Hardy from zones 2 to 11, this plant reaches 18 to 36 inches tall and produces edible leaves and flowers with a distinctive mild cucumber flavor. From seed to bloom takes 50 to 60 days, and the flowers cluster in showy racemes from June through November, attracting pollinators throughout the growing season. Both leaves and blooms are culinary treasures, equally at home in a garden bed or container.
12
Full Sun
Moderate
2-11
36in H x 18in W
—
Low
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Borage produces an abundance of star-shaped blue flowers that cluster in groups of 8 to 10 on branched stems, creating a surprisingly large and impressive plant despite its delicate-looking blooms. The entire plant, from wrinkled gray-green leaves to nectar-rich flowers, carries a mild cucumber flavor that makes it as useful in the kitchen as it is beautiful in the garden. Deer-resistant and drought-tolerant once established, borage thrives on neglect, self-seeds readily year after year, and grows equally well in full sun or partial shade, making it one of the least fussy edibles you can plant.
Borage leaves and flowers serve multiple culinary purposes. The mild cucumber-flavored leaves can be eaten raw in salads, cooked like spinach, or used to flavor pickles and cream cheese spreads. The edible flowers are equally versatile: scattered fresh in salads, frozen into ice cubes for lemonade or cocktails, dried for herbal teas and blends, or used as garnishes. Historically, the plant was valued for infusions into wine and syrups. The flowers contain omega-6 fatty acids, particularly GLA, adding nutritional value beyond their visual appeal.
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Start seeds indoors 3 to 4 weeks before your average last frost date in biodegradable pots, as borage is sensitive to taproot disturbance. Keep soil at 60 to 70°F for germination. Because transplanting is difficult and not recommended, use peat pots or other biodegradable containers that can be planted directly into the ground without disturbing the roots.
Transplant seedlings into the garden after the last frost date, planting the entire biodegradable pot directly into the soil to avoid root disturbance. Space individual plants 12 inches apart.
Direct sowing is the recommended method. Sow seeds outdoors as soon as soil has warmed in spring, or 1 to 2 weeks before your average last frost date when soil temperature reaches at least 40°F (ideally 60 to 90°F). Plant seeds 1/4 to 1/2 inch deep, spacing 3 seeds per foot in rows 24 inches apart. Thin seedlings to 12 inches apart when they reach 2 inches tall. Seeds germinate in 7 to 14 days.
Harvest leaves and flowers as needed for fresh use. For maximum flavor and culinary quality, pick tender leaves before the plant becomes too large. Harvest flowers as they begin to bloom; at this stage, both flowers and leaves contain optimal flavor and essential oil content. For drying, harvest at peak maturity and hang small bunches from the ceiling in a warm (80 to 90°F), dark location with good ventilation for 1 to 2 weeks. Dried flowers preserve best when dried quickly under moderate heat with good air circulation. Borage readily self-seeds, so you can leave mature seed heads on the plant to drop seeds for next season's crop.
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“Borage has a deep Mediterranean roots and a documented place in European gardening history. Gerard the Herbalist, writing in the 1500s, praised borage so effusively that his words have survived five centuries: he claimed that leaves and flowers steeped in wine would make people 'glad and merry' and drive away sadness and melancholy, while syrups made from the flowers would 'comforteth the heart.' This herb wasn't merely ornamental or medicinal to past gardeners; it was a source of emotional and physical comfort, valued enough to mention in some of the earliest garden literature. Its journey from Mediterranean gardens to kitchen gardens across temperate regions reflects both its practical usefulness and its romantic appeal to generations of herb growers.”