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Borage (Borago officinalis) is a vigorous, self-seeding annual herb with brilliant star-shaped blue flowers and a fresh cucumber flavor in both leaves and blooms. Growing 2–3 feet tall in zones 2–11, it's one of the most valuable companion plants in the garden — drawing beneficial pollinators, repelling tomato hornworm, and reportedly improving the flavor and vigor of neighboring strawberries and tomatoes. The edible flowers are stunning frozen in ice cubes or scattered over salads, while young leaves add a mild cucumber note to drinks and cooked dishes.
Direct sow borage where it will grow — it dislikes transplanting due to a deep taproot. Sow in full sun in average, well-drained soil after last frost. Thin to 12–18 inches. Water regularly until established, then borage is remarkably drought-tolerant. Staking may be needed for tall plants in windy locations. Deadhead spent flowers to extend blooming, or let a few go to seed for next year's self-sown crop. Harvest young leaves before the surface hairs become coarse (they become rough as they age). Pick flowers just as they fully open for peak color and flavor. Avoid planting near fennel; pairs exceptionally well with tomatoes and strawberries as a companion plant.
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