This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring. Position: full sun or partial shade; Soil: fertile, moist, well-drained; Rate of growth: average; Flowering period: May to June; Hardiness: fully hardy but short-lived Gorgeously scented pure white flowers are held above rosettes of dark green leaves. This is a biennial or short-lived perennial that readily self-seeds, often coming true to type, so it is perfect for naturising in a wildlife garden. Like all sweet rockets it is highly attractive to bees and other beneficial insects, and the fragrant flowers perfume the air in spring and early summer evenings. They are also edible and look great sprinkled over salads. Although relatively short-lived, it self-seeds freely; Garden care: Replace plants every two to three years as flowering diminishes with age. Plants will self-seed freely.