Spurge

This architectural perennial is perfect for adding a touch of drama to the border. Bluish-green foliage looks fresh all year round, and in early summer it is joined by large, dome-shaped, lime-yellow flowers that tower above it. The bright reds and oranges of kniphofias make perfect partners. Plants enjoy a sunny, well-drained spot, making them the perfect choice for a gravel garden. Cut down the flower stems to ground level as the blooms fade. Be careful when handling the plant as the thick, white sap can irriate the eyes and skin. The Royal Horticultural Society has given itsr prestigious Award Of Garden Merit (AGM).