Description
Ajuga ‘Metallica Crispa’ – crinkled bugle
Botanical name: Ajuga reptans ‘Metallica Crispa’
Common names: Bugle, carpet bugle
Family: Lamiaceae (mint family)
Plant type: Evergreen perennial
Habit: Low, mat-forming and spreading
Pot size: 1 litre pot
Eventual size: Approx. 10–15cm tall in flower × 30–45cm spread
Foliage: Crinkled, metallic bronze-purple leaves in dense low rosettes; evergreen
Flowers: Spikes of deep blue flowers, spring to early summer (April–June)
Scent: Not scented
Aspect / light: Partial shade to full sun
Soil: Most soils; moist but not waterlogged; any pH
Hardiness: RHS H6 (hardy, to about −20°C); USDA zones 4–9
Exposure: Sheltered or exposed; tolerant
Native range: Species native to Europe
Toxicity / pet & child safety: Generally considered non-toxic to people, cats and dogs
Ajuga ‘Metallica Crispa’ is an unusual, compact bugle with crinkled, metallic bronze-purple leaves forming dense low rosettes. Short spikes of deep blue flowers rise in spring, ideal for edging, troughs and shady groundcover.
GardenAdvice notes
A low, mat-forming evergreen perennial in the mint family, this bugle spreads by short runners to weave a dense, weed-suppressing carpet. It is grown chiefly for its handsome foliage, which holds colour year-round, with the bonus of blue flower spikes in spring, and it is one of the most reliable evergreen groundcovers for sun or shade.
Growing & planting
Plant in autumn or spring in moist but well-drained soil in partial shade or sun. Leaf colour is usually richest in good light with some shelter from fierce midday sun. It tolerates most soils provided they neither bake dry nor sit waterlogged. Space about 30cm apart to form continuous groundcover.
Care & maintenance
Very low-maintenance. Keep the soil from drying out while establishing, trim off faded flower spikes, and lift and split congested mats every few years to maintain vigour. Remove any reverting shoots to keep coloured or variegated forms true.
Propagation
- Division: Lift and divide established mats in spring or autumn, replanting sections immediately.
- Runners: Detach rooted plantlets from the runners through the growing season and replant or pot on.
Pests & diseases
Generally trouble-free. Crown and root rot can occur in wet, poorly drained soil, and powdery mildew may appear if plants dry out in hot weather. Slugs and snails occasionally graze new growth. Good drainage with steady moisture prevents most problems.
Uses in the garden
Ideal as evergreen groundcover for the front of borders, shaded and difficult spots, softening bed and path edges, and adding foliage colour to mixed containers.
Wildlife value
The spring flower spikes provide an early source of nectar for bees and other pollinating insects.
Toxicity & safety
Ajuga is generally regarded as non-toxic to people and to cats and dogs, making it a good choice for family and pet-friendly gardens.
GardenAdvice tip
‘Metallica Crispa’ is more compact and slower than most bugles, its curiously crinkled, metallic leaves earning it a place in troughs and containers where they can be admired close up. Its neat habit means it won’t run away as some bugles do, so it suits smaller, more controlled plantings.
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