A classic cottage‑garden perennial forming soft mounds of pleated, apple‑green leaves that catch raindrops like beads of silver. From June to August it produces clouds of frothy chartreuse flowers that soften border edges and fill gaps beautifully. Exceptionally adaptable — thriving in sun or shade and in almost any soil — it’s a reliable, low‑maintenance groundcover that self‑seeds gently if allowed. Perfect for underplanting roses, edging paths, or adding a naturalistic, airy texture to mixed borders. An RHS Award of Garden Merit plant for good reason.