Position full sun Soil moderately fertile moist well-drained soil Rate of growth average Flowering period June to October Hardiness half hardy annual This popular annual cosmos makes a great filler for a sunny border and as long as its dead-headed regularly it will produce a succession pure white saucer-shaped flowers from early summer to mid-autumn. Its very easy to grow and it makes an invaluable addition to the cutting garden Garden care In early spring sow shallowly in seed trays and keep under glass transplanting them into individual pots when large enough to handle. Harden off before planting outside after the frosts. Alternatively sow in-situ im mid- to late spring in a well-prepared bed and thin the seedlings out as they grow to allow approximately 30cm between each. As the seedlings grow pinch out the tips to encourage bushier plants.