Sedum acre is a low-growing hardy succulent forming a mat of tiny fleshy green leaves, which becomes blanketed in bright clusters of yellow star-shaped flowers in summer. Thriving in dry sunny spots and poor, thin soils, this drought-tolerant British native requires virtually no maintenance and is ideal for dry ground cover, green roofs, rockeries, coastal gardens and planting into walls. The flowers are attractive to bees and other insects. Height: 5-10cm (2-4ins). Spread: 30-60cm (12-24in).