Gratiola officinalis, commonly known as hedge hyssop, is a perennial aquatic or semi-aquatic plant native to Europe and parts of Asia. It features upright, slender stems with finely toothed, opposite leaves and delicate, pale lilac to pink tubular flowers with yellow markings, blooming from late spring to summer. Typically found in wet meadows, marshes, and along pond edges, it prefers damp, nutrient-rich soils. Historically used in herbal medicine, this plant is now appreciated for its ornamental qualities and its ability to support wetland biodiversity.

why we like it

• Attractive, delicate flowers add charm to pond edges

• Supports biodiversity in wetland gardens

• Tolerant of consistently damp conditions

what to know

• Thrives in moist to wet, humus-rich soil

• Prefers full sun to partial shade

• Ideal for pond margins or bog gardens

• Avoid waterlogged compacted soils

• May self-seed in suitable conditions

flower colour
Pale lilac to pink with yellow markings

flowering months
June, July, August

Height and Spread
Height: 30–50 cm
Spread: 20–30 cm