Origanum – or Sweet Dittany – makes bright cushions when it is planted in full sun. 4 Flower colour is well set off by mellow stonework. 5 A white curtain of clematis hangs from the eaves. 6 Multi-coloured flowers, including white Anthemis, and a flourishing tree peony on a background of contrasting foliage. 7 A single column set off by a screen of evergreens. 8 Thick-set shrubs cover the ground and suppress weeds. 9 White flowers again – Delphinium â€˜Galahadâ€™ is one of the best; white delphiniums with black â€˜eyesâ€™ are particularly effective. when we came, and I added others, including tree peonies, which did particularly well. There is a white â€˜Mrs. William Kelwayâ€™ which leans out over a pond, making a lovely effect. As a general rule, we aimed at a colour theme for all our plantings. I never tire of white borders -1 love all white flowers.