Ajuga pyramidalis 'METALLICA CRISPA' pyramidal bugle, bugleweed

Metallica Crispa is a striking cultivar of pyramidal bugleweed, a species native to alpine regions of Europe. Unlike the more vigorous A. reptans, this form grows in compact rosettes and spreads slowly. Its foliage is highly ornamental and semi-evergreen in mild climates. The leaves have a metallic sheen and range in colour from deep green to bronze-purple and nearly black, depending on light and season. Their surface is puckered and blistered, with wavy edges that give the plant a sculptural texture. The leaves form a dense, low mat, and from late spring to late summer, the plant produces short, about 25 cm tall, upright spikes of deep blue to violet two-lipped flowers. The plant’s size without flowers is typically about 10-15 cm tall and 40-50 cm in width. Propagation occurs via short rhizomes, and the plant is notably resistant to soil-borne diseases that often affect A. reptans.

The origin of Metallica Crispa remains undocumented. It is listed as a recognized cultivar in databases such as the Royal Horticultural Society, but without attribution to a breeder or date of introduction. Based on available records, it likely emerged as a garden selection in Western Europe – possibly in the UK or Germany – sometime in the 20th century. The earliest confirmed herbarium specimen dates to 1999, collected in Surrey, England by K. Simpson. However, nursery catalogues suggest it was already in circulation by the 1980s, and it has since become a reliable fixture in European horticulture. The lack of formal registration implies it was propagated vegetatively and adopted informally, which is common for older perennial selections.

In garden design, bugleweed excels as a groundcover for partial shade or dappled light. It pairs beautifully with brunneras, hostas, heucheras, ornamental grasses, and ferns – especially in contrasting colour schemes. It also performs well in lightly shaded but not too dry rock gardens, between stones, or as a border edging. Its dark foliage provides a dramatic backdrop for pale-flowering perennials. In containers, it works as a trailing accent, particularly alongside small-flowered annuals, adding depth and texture to mixed plantings.

This cultivar is low-maintenance and adaptable. It thrives in humus-rich, well-drained soils of any pH, with moderate moisture, and prefers partial shade. It is fully hardy down to –37 °C (USDA zone 3) and highly resistant to pests and diseases. As a member of Ajuga pyramidalis, it maintains a compact form without stolons, remaining stable in its location. If the plant begins to decline, it’s usually due to environmental stress rather than natural migration. Occasional division and replanting will rejuvenate it and help maintain vigour. In containers, be mindful of overwatering.

Last update 11-09-2025