Stachys macrantha (Big Betony) — perennial

Overview

Stachys macrantha is a perennial in the genus Stachys, part of the Q53476 family. Stachys macrantha grows best in full sun and partial shade, and tolerates well-drained soils. Its UK hardiness is rated H5. Suggested uses include borders and rock gardens. It is native to Caucasus, northeastern Turkey and northwestern Iran.

About

Stachys macrantha is a perennial that produces purplish-pink flower spikes through the summer, with bloom from June to September. Native to the Caucasus, northeastern Turkey and northwestern Iran, it adapts to temperate garden sites. Plant it where soil stays moist yet drains freely and where it receives full sun or partial shade. It is rated H5, meaning it is hardy across most of the UK.

Wikipedia contributors, CC BY-SA 4.0 — Betonica macrantha

About the genus

Stachys is a genus of plants, one of the largest in the mint family Lamiaceae. Estimates of the number of species vary from about 300 to about 450. Plants of the World Online accepts 373 species.

Wikipedia contributors, "Stachys", CC BY-SA 4.0 — Stachys

In the garden

A perennial from the Caucasus, northeastern Turkey and northwestern Iran, Stachys macrantha offers a summer run of purplish-pink flowers from June to September. Its season extends from early summer into early autumn, providing colour at a time when borders are moving toward later-season interest. Use the flowering period to layer it with earlier and later-flowering perennials for steady succession. Give Stachys macrantha full sun to partial shade and soil that is well drained but retains some moisture; it does not suit drought-prone free-draining gravel without moisture retention. The species is rated H5 (hardy), so it is suitable for planting outdoors across most of the UK without special winter protection. A mulch layer in autumn helps moderate soil moisture through drier spells and reduces surface-root competition in heavier soils. In garden use, it sits well in mixed borders and rock gardens where summer flower spikes can be seen at close range. Flowering from June to September makes it helpful for filling the mid- to late-season band in a border or lifting a rock garden's summer display with repeated colour through the warmer months.

Growing conditions

Best soil and position for Stachys

Sunlight: full sun, partial shade
Soil type: well-drained
Soil moisture: moist
UK hardiness: H5

Plant details

Stachys macrantha size, habit and characteristics

Plant type: perennial
Suggested uses: borders, rock gardens
Native to: Caucasus, northeastern Turkey, northwestern Iran

Care notes

Pruning and caring for Stachys macrantha

Cultivation: Prefers moist, well-drained soil in full sun to partial shade. Tolerates some drought once established.
Pruning: Cut back after flowering to maintain shape and encourage fresh growth.
Propagation: Division in spring or autumn; seed propagation possible but slow.