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Pyramidal Bugle

Ajuga pyramidalis · Lamiaceae

The gardener's calendar

The right move for September

Ideal time to plant pyramidal bugle: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

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ID card

Family
Lamiaceae (mints)
Form
Perennial herb
Foliage
Persistent to semi-persistent
Flowering
April to June, blue-violet flowers in pyramidal spikes
Mature size
15 to 30 cm in height × 30 to 40 cm spread
Growth
Moderate, rapid under optimal conditions
Hardiness
Very hardy (-15°C and below)
Origin
Europe, mountainous regions

Care

Watering

Water regularly during active growth (spring-summer), keeping the soil moist but well-drained. Reduce watering in autumn-winter. Avoid standing moisture, which can cause root rot. Light mulching helps retain soil moisture.

Light exposure

Choose a location in full sun to partial shade (at least 4 hours of direct sunlight). In very hot climates, afternoon shade prevents excessive drying. Pyramid bugle tolerates partial shade well, remaining vigorous and compact there.

Soil

Plant in rich, well-structured, well-drained soil. Add compost or potting soil at planting to improve rooting. Avoid compacted or poorly-aerated soils. Slightly acidic to neutral soil is ideal.

Pruning and deadheading

Remove faded flower spikes to extend flowering and encourage branching. In late winter or early spring, lightly cut back foliage to rejuvenate the plant and thicken its shape. Regular pruning maintains a compact, naturally pyramidal form.

Fertilizing

Apply balanced fertilizer in spring as growth begins. A second application in early summer supports flowering. Avoid excessive feeding, which encourages loose foliage. Well-rotted compost is generally sufficient for established plants.

Diseases and pests

Pyramid bugle is little prone to disease if drainage is correct. Watch for aphids and spider mites during dry spells. Powdery mildew may appear with excessive moisture and poor air circulation. Remove affected parts and improve aeration.

Did you know?

Ajuga pyramidalis gets its name from Latin 'a-iugum' (without a yoke), as its floral bracts are not fused together. In the Middle Ages, various Ajuga species were used in teas reputed to be beneficial, and the plant remains an excellent ornamental ground cover for rock gardens and low-maintenance spaces.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.