Versatile shrubby perennials, excellent for growing in the rock garden, or at the front of a hot, sunny border. This selection has double pink flowers, over a mound of silvery-grey foliage. Plants must have very good drainage, particularly through the winter. Trim plants lightly with hedge shears immediately after blooming, to prevent opening up in the middle. Drought tolerant, once established, these will also put up with poor, sandy soils.