Growing Borage in Scotland: The Complete Guide

Borago officinalis

Borage is an easy annual with edible, sky-blue, star-shaped flowers and a cucumber-like fragrance. Three things are worth knowing first: guides differ on whether to transplant it, it can irritate bare skin, and it self-seeds freely.

It tolerates most soil short of waterlogging, without the strict drainage many Mediterranean herbs need.

Site and soil

Choose a spot in full sun, though light shade is tolerated. Almost any soil works except waterlogged ground; moist soil through summer gives the best growth, though plants tolerate dry soil too, just shorter. Space plants around 30-50cm apart: 50cm is the RHS figure, while Gardener's World thins to at least 30cm. For containers, use a large pot, at least 25cm deep and over 30cm wide, filled two-thirds with peat-freeCompost made without peat, which is harvested from a slow-forming, carbon-storing wetland habitat that peat extraction damages. Full definition → compost and one-third coarse grit, though borage isn't ideally suited to container growing in the first place.

Sowing

Direct-sowing is the safer route: borage forms a deep root and doesn't do well if transplanted, so sow the large seeds where the plant is to flower, about 5cm deep, from mid-spring after the last frost, at around 15C. Planting seedlings is also a standard option, which works but carries more transplant risk. A second sowing in late spring extends the display.

Care through the year

Ground-grown plants tolerate dry periods once established, though moist soil through summer produces bigger plants; container plants need regular watering, potentially daily in summer. Feeding isn't usually needed, though poor or sandy soil benefits from a general fertiliser in spring. DeadheadRemoving spent flowers before they set seed, which redirects a plant's energy into further flowering rather than seed production. Full definition → faded flowers to encourage more blooms and to control self-seeding, since borage drops seed readily and will spread on its own if left unchecked. Wear gloves when handling plants: the hairy leaves can cause contact dermatitis in people with sensitive skin. Tall plants can become top-heavy as they flower, so push in a few canes early rather than trying to straighten a fallen plant with its taprootA single, thick, dominant root growing straight down from a plant, storing energy and anchoring it, as opposed to a spreading mass of fine roots. Full definition → already down. Borage is best eaten only occasionally: regular or frequent consumption isn't advised without medical advice.

Harvesting

Pick the sky-blue flowers through summer, edible and best used to garnish drinks and salads, with a cucumber-like fragrance. Young leaves are also usable while tender.

Varieties

There are four varieties of borage (standard blue Borago officinalis, Alba, Bill Archer, and the perennial Borago pygmaea), none carrying AGMThe RHS's Award of Garden Merit: a UK-wide trials award for reliable performance, not a Scotland-specific recommendation. Full definition → — standard blue is the plain default. Alba (white flowers) and Bill Archer (cream variegated leaves) are colour variants, unlike the distinct perennial form.

Also worth considering

Best Borage Varieties for Scotland → compares all named borage varieties head-to-head, with the practical detail that doesn't fit in a summary card.

Common problems

• Powdery mildew can appear in late summer; pull and compost affected plants.
• Slugs can damage foliage.
• Leaf-mining flies can also damage foliage.
• Blackfly can colonise young growth. Borage grown beside broad beans is reported to draw them away from the beans.

Common questions

Sources