Hypericum tetrapterum
square-stalked St John's wort
- 3 × 9cm pots
- £27.99
- shipped within 1 Week
- 1 litre aquatic pot
- £21.99
- available to order from spring 2025
- 3 × 1 litre aquatic pots
- £34.99
- available to order from spring 2025
Delivery options
- Standard £5.95
- Position: full sun or partial shade
- Depth of water: 0-5cm (0-2")
- Rate of growth: average
- Flowering period: June to September
- Hardiness: fully hardy
An erect perennial with square stems, winged at the corners, is a delightful presence in late summer to early autumn, adorned with domed clusters of sunny yellow flowers, each measuring up to 1cm across. A British native, Hypericum tetrapterum is a common sight in damp grasslands, embracing its role as a native and bee-friendly perennial. With stout stems showcasing four winged ridges, this medium-height grassland wildflower thrives in fertile damp or wet soils. Its habitat repertoire includes meadows, ditches, marshes, and the verdant banks of ponds and rivers, making it a versatile and attractive addition to various wet-footed landscapes.
Plant out in reliably moist or boggy soil, or pot up into a pond basket and place at the margins of a pond in shallow water no deeper than 5cm (2"). A low maintenance plant, cut back foliage to ground/water level at the end of the year. Divide congested clumps in early spring every few years.