Bugleweed
Ajuga reptans
Bugleweed is a low, fast-spreading evergreen groundcover prized for its glossy rosettes and spikes of blue-violet flowers in spring. It quickly carpets bare ground in sun or shade.
- Light
- Full sun to part shade
- Water
- Moderate; keep evenly moist
- Difficulty
- Easy
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Overview
Bugleweed (Ajuga reptans) is a mat-forming perennial in the mint family that spreads by creeping above-ground runners called stolons. It is one of the most reliable groundcovers for filling difficult spots, including dry shade and slopes.
Gardeners grow it for both its foliage and its flowers. Cultivars range from glossy green to bronze, burgundy, and tricolor cream-pink-green, while short flower spikes of vivid blue rise above the leaves each spring.
It is vigorous to the point of being aggressive, so it is best where it has room to roam or is contained by edging or hardscape.
How to identify it
- Habit: Low evergreen mat, typically 4-6 in tall in leaf, spreading by runners that root at the nodes
- Leaves: Spoon-shaped, glossy, arranged in basal rosettes; green, bronze, purple, or variegated depending on cultivar
- Flowers: Whorled spikes 4-9 in tall, usually deep blue to violet (occasionally pink or white), blooming mid to late spring
- Spread: Forms dense, weed-suppressing carpets several feet wide over time
Care & growing
- Light: Tolerates full sun to fairly deep shade; richest leaf color develops in part sun
- Water: Average moisture; established plants take some drought but prefer evenly moist soil
- Soil: Adaptable to most soils with decent drainage; dislikes soggy, poorly drained ground (can develop crown rot)
- Temperature: Hardy roughly USDA zones 3-9; evergreen in mild winters
- Feeding: Rarely needed; a light spring topdressing of compost is plenty
- Propagation: Easiest of all by dividing rosettes or detaching rooted runners any time in the growing season
Habitat & origin
Bugleweed is native to Europe, including the British Isles, and parts of western Asia and North Africa, where it grows in damp meadows, woodland edges, and grassy clearings.
It has naturalized widely in North America and is commonly planted as a groundcover under trees, along paths, and in shady borders worldwide.
Uses & benefits
Ornamental: Its main use is as a tough, attractive groundcover for shade, slopes, and the front of borders, and for suppressing weeds.
Ecological: The spring flowers are a useful early nectar source for bees and other pollinators.
Practical: Effective for erosion control on banks and for greening areas where lawn grass struggles.
Frequently asked questions
Is bugleweed invasive?
It spreads aggressively by runners and can creep into lawns and beds. It is not a noxious weed in most areas, but plant it where you can contain it with edging or hardscape.
Will bugleweed grow in full shade?
Yes. It tolerates fairly deep shade, though flowering and the deepest foliage colors are best with some sun.
Can I mow over bugleweed?
You can mow off the spent flower spikes after bloom to tidy it up, but mowing is not required for the foliage mat.
Is Ajuga the same as the herb bugleweed?
No. The medicinal herb sometimes called bugleweed is Lycopus, a different plant. Ornamental Ajuga reptans is the groundcover described here.
Bugleweed guides
In-depth guides for identifying, growing, and caring for Bugleweed.
