Sedums (stonecrops) are easy plants with succulent foliage, often brightly coloured, either all year or at certain seasons. In this group are the small varieties, suitable for rock gardens, raised beds and troughs. There are clusters of starry flowers, often yellow, but there are also pink and white ones.

Sedum spathulifolium 'Purpureum' is a variety in which the mats of glaucous grey leaves become purple red, giving a striking tri-coloured effect when the yellow flowers are out - but in my view it is more attractive and restrained at other times.