How to Grow Ajuga Plants in your Garden

Gardener's HQ Guide to Growing Bugleweed, Ground Pine, and Carpet Bugle

The common name for the Hardy perennial Ajuga is Bugleweed.

It typically flowers from late spring to mid-summer.

Latin names include Ajuga reptans, Ajuga turkestanica and Ajuga reptans atropurpurea.

Ajuga - bugleweed
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 3: 101.

Description of Bugleweed

Ajuga are matt forming evergreen plants. This makes them ideal for growing as a ground covering plant.

Bugleweed, has a mass of blue and purple flowering stems that sit above the foliage of leaves. These can be as variable in colour as deep green, purple, pink, and cream.

Ajuga photograph
Ajuga (possibly Ajuga turkestanica) photograph by Wallygrom

Commonly Grown Ajuga Species Photographs and Plant Identification

Ajuga reptans

Ajuga reptans
Ajuga reptans (Bugle / Common Bugle / Bugleweed / Carpetweed), photograph by Andreas Rockstein; CC.

Ajuga genevensis

Ajuga genevensis
Ajuga genevensis (Upright Bugle / Geneva Bugleweed / Blue bugle), picture by Val Def; CC.

Ajuga Growing and Care Guide

  • Common Names: Bugleweed, Ground pine, Bugle: Carpet, Common, Geneva, Blue, Mountain. Carpenter's Herb.
  • Life Cycle: Hardy perennial. Hardy Annual.
  • Height: 2 to 20 inches (5—50 cm).
  • Native: Europe, Asia, Africa, Australia.

  • Growing Region: Zones 3 to 9.
  • Flowers: Early spring through to mid-summer.
  • Flower Details: Blue, White, Pink/rose. Upright spikes. Whorls of flower, Ajuga reptans has dark veins on the lower lips of its flowers.
  • Foliage: Herbaceous. Opposite. Obovate. Rosette. Common Bugle has dark green leaves with purple highlights. Commonly grown cultivars have purple, pink, green, and cream foliage.

  • Sow Outside: Cover seed. Spring or autumn. Sow thinly.
  • Sow Inside: Germination time: three to four weeks. Temperature: 50 to 60°F (10—15°C). Water from below. Cover the container with a plastic bag until seeds germinate. Transplant to individual pots when seedlings are strong. Transplant outdoors once further established - in the summer. Space at 12 to 15 inches (30—40 cm).

  • Requirements and care: Prefers shade, but will tolerate full sunlight. Good drainage. Most soils when grown in the shade. Requires a richer, humus soil when grown in full/partial sunny areas of the garden.
    Ideally soil should have a slightly acidic to neutral pH. Water during prolonged dry spells if growing in a sunny area. Remove un-variegated leaves. Remove offsets/runners from young plants to prevent spread; it is best to grow Ajuga in a contained area.
    Growing Ajuga in a sunny area also slows down its growth/spread rate. Deadhead to prevent seed set. Divide every three years to prevent rotting crowns. Propagate: by dividing clumps early in the spring or in autumn; self-seeds freely.

How to Grow Bugleweed / Ajuga

It is best to sow seeds on the soil surface. Simply cover the Ajuga seeds with a light dusting of soil on top.

They should be spaced 15 to 30 cm (6 to 12 inches) apart in the spring or autumn.

Ajuga plant species can grow in either full sunlight or in the shade.

The soil should be dry and ideally have a pH in the range of 5.5 to 7.1.

Ajuga requires between three to four weeks to germinate. If initiating growth indoors, they should be grown at a temperature of 10 to 12 degrees centigrade (50 to 54°F).

Caring for Ajuga in the Garden

The Ajuga plant is very easy to look after. For best results they should be fertilised in the spring, and watered frequently.

The spent flower heads should be removed after blooming, and leaves removed in the Autumn.

I hope that you enjoyed this guide on Ajuga. As this plant is a member of the mint family (Lamiaceae), you may also enjoy the following garden growing guides: How to grow Melissa, Mint, Gaultheria procumbens, and Scutellaria plants.