Hundreds of pure white, sweetly scented flowers smother this dainty alpine perennial in spring. Arabis caucasica 'Snowcap' forms tidy cushions of evergreen, grey-green foliage and its spreading habit makes it perfect for rock gardens, wall crevices, patio containers or as a groundcover plant. Drought tolerant and easy to grow, Arabis are the ultimate low-maintenance perennial. Height: 10cm (4). Spread: 50cm (20).