Description
Salvia officinalis – broad-leaved sage
Botanical name: Salvia officinalis
Common names: Broad-leaved sage, common sage
Family: Lamiaceae (mint family)
Plant type: Evergreen aromatic sub-shrub
Habit: Bushy, mound-forming
Pot size: 1 litre pot
Eventual size: Approx. 45–60cm tall × 60cm spread
Foliage: Soft, felted, aromatic grey-green leaves; evergreen
Flowers: Spikes of blue-purple flowers in early summer (June–July)
Scent: Strongly aromatic foliage
Aspect / light: Full sun
Soil: Well-drained; poor to average; tolerates lime; dislikes wet; any pH
Hardiness: RHS H5 (hardy, to about −15°C); USDA zones 5–9
Exposure: Open, hot, dry, sunny
Native range: Native to the Mediterranean
Toxicity / pet & child safety: Generally considered non-toxic to people and pets
Salvia officinalis, broad-leaved sage, is a classic evergreen aromatic sub-shrub with soft, felted grey-green leaves and blue-purple flowers in early summer. Tough and drought-tolerant, it is superb for sunny borders and pots.
GardenAdvice notes
A classic Mediterranean evergreen sub-shrub, common sage is grown for its soft, felted, aromatic grey-green foliage, which gives year-round colour and texture, and its spikes of blue-purple flowers in early summer. Tough, drought-tolerant and handsome, it is as much an ornamental foliage plant as a herb, thriving in hot, dry, sunny, well-drained spots.
Growing & planting
Plant in spring in well-drained soil in full sun — it thrives on poor, dry soils and dislikes rich, wet, heavy ground, which shortens its life. It tolerates lime and drought. Ideal for sunny borders, gravel, herb gardens and containers. Improve heavy soil with grit. Space about 50cm apart.
Care & maintenance
Low-maintenance. Trim it lightly after flowering, or in spring, to keep it bushy and compact, but avoid cutting hard back into the old, bare wood, which it is reluctant to reshoot from. Water only while establishing; thereafter it is drought-tolerant. Replace or layer old, woody, sprawling plants every few years.
Propagation
- Cuttings: Take softwood or semi-ripe cuttings in summer.
- Layering: Peg down low stems to root, then detach.
Pests & diseases
Generally trouble-free in a sunny, well-drained spot. Its main enemy is wet, heavy soil, which causes rot. Old plants tend to go woody and sprawl open at the base. Rosemary beetle may occasionally appear.
Uses in the garden
Superb for sunny borders, gravel and Mediterranean-style gardens, herb gardens, silver and foliage plantings, and containers, where its soft grey foliage sets off brighter colours beautifully.
Wildlife value
The early-summer flowers are very attractive to bees and other pollinating insects, and the aromatic foliage is generally left alone by browsing animals.
Toxicity & safety
This herb is generally regarded as non-toxic to people and pets.
GardenAdvice tip
Sage is a lovely dual-purpose plant — a handsome grey-leaved evergreen for a sunny border as well as a herb — and its early-summer flowers are great for bees. Give it full sun and sharp drainage, trim it after flowering to keep it bushy (never into the bare old wood), and be ready to replace or layer it every few years, as older plants tend to go woody and sprawl open in the middle.
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