Will it take over my garden?

Yes, it spreads quickly by runners and can become invasive in ideal conditions.

It tolerates occasional light mowing, but it is best left to form a low carpet.

Plant guide

Bugleweed.

Ajuga reptans L.

Pronounced uh-JOO-guh REP-tanz

Also known as Ajuga, Blue Bugle, Bugle, Bugleherb, Bugleweed, Carpet Bugleweed, Common Bugle

carpet bugle — Photo by Nasser Halaweh (CC BY) via iNaturalist

Bugleweed is a fantastic, low growing groundcover that spreads quickly to fill in empty spots in your garden. It produces lovely spikes of blue or purple flowers in the spring that bees absolutely adore. You will find it is a hardy little plant that handles shade quite well.

At a glance

Care level: Easy
Plant type: Perennial groundcover
Light: Partial shade to full shade
Indoor light: Medium light
Water: Every 3 to 7 days
Mature size: 6 to 9 inches tall
Growth rate: Fast
Hardiness: USDA 3 to 9
Bloom time: Mid to late spring

Care

Keep the soil consistently moist but not waterlogged to help it spread effectively. Watch for wilting during hot spells, which indicates it needs more water. You can easily divide the clumps in spring or fall to manage its spread.

Watering: Keep the soil evenly moist, especially during dry summer periods.
Feeding: Apply a balanced liquid fertilizer once in early spring to encourage growth.
Pruning: Trim back after flowering if you want to tidy up the appearance or control its spread.
Repotting: If growing in a container, move to a larger pot once the roots fill the current space.
Soil: Well draining, humus rich soil
Soil pH: 6.0 to 7.0
Temperature: -30 to 35°C
Humidity: 40 to 70%

Safety

People: The plant is generally considered non-toxic to humans, but ingestion is not recommended.
Pets: This plant is generally considered non toxic to cats and dogs.
Children: While not highly toxic, it is best to keep small children from eating the leaves to avoid potential stomach upset.
Contact allergens: Some individuals may experience mild skin irritation from handling the foliage.
Airborne allergens: There are no significant reports of respiratory allergies associated with this plant.
Edibility: This plant is not considered edible and should not be consumed.

How to identify it

Low growing mat forming habit
Oval shaped dark green leaves
Spikes of blue purple flowers
Spreads via creeping stolons

Height: 0.05 to 0.15m
Spread: 0.3 to 0.6m
Leaves: green, bronze, purple, semi-evergreen
Flowers: blue, purple, white, 1 to 2cm

Problems to watch for

AphidsCommon
Root RotCommon
Powdery MildewUncommon
Slugs and SnailsUncommon

By symptom

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Growing it

Propagation: division, seed, cuttings
When to plant: spring, autumn

Pair with taller shade plants to create a layered look that keeps the ground cool and moist.

Grows well with

Hosta — They share similar shade and moisture requirements.
Ferns — The contrasting textures look lovely together in a woodland setting.

Similar species

Lamium — Another low growing ground cover that thrives in similar light conditions.

Science

Family: Lamiaceae
Genus: Ajuga
Order: Lamiales
Class: Magnoliopsida
Native range: Europe, western Asia, and northern Africa.
Conservation: This plant is not of conservation concern and is widely naturalized in many regions.

It naturally inhabits moist meadows and woodland edges where it uses its stolons to colonize open ground.

Value to wildlife: nectar source
Pollinators: bees, butterflies
Uses: ground cover, rock gardens, erosion control

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Moisture: 6/9
Salinity: 2/9
Soil reaction: 5/9
Light: 4/9
Temperature: 5/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Will it take over my garden?: Yes, it spreads quickly by runners and can become invasive in ideal conditions.
Can I mow it?: It tolerates occasional light mowing, but it is best left to form a low carpet.

Where the name comes from

The genus name Ajuga is derived from the Greek word a-jugos, meaning unyoked, while the species name reptans refers to its creeping habit.

Good to know

It is commonly known as bugleweed or carpet bugle.
The plant forms a dense mat that effectively crowds out most weeds.
It thrives in both sun and shade, though foliage color is often more intense in partial sun.

Also in

Plants for shade

Keep your bugleweed growing

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.