Cosmos 'Purity White' Seeds

Cosmos Purity seeds produce a classic white cosmos with large, pure petals and an upright growth habit. Plants reach 90 to 120 cm tall and flower from midsummer through autumn, making them a popular choice for borders and cut flower gardens in the UK. Botanically it is Cosmos bipinnatus ‘purity’, and it also goes by Garden cosmos and Mexican aster. It is an annual, completing its whole life in one season, so sow again the following year.

Sow March to June under cover or in pots, or April to June direct outdoors. Seedlings usually appear in 7–14 days. Watering: moderate; allow soil to dry slightly between watering.

Cosmos Purity typically reaches 90 to 120 cm tall with a spread of about 45 cm. The upright habit and long stems make it well suited to borders, containers, and dedicated cutting rows.

Yes. Cosmos Purity produces long, sturdy stems that hold up well in a vase. The flowers are large and clean white, lasting several days once cut. It is one of the most reliable cosmos varieties for home cutting gardens. Harvest: Cut flowers when buds open for longest vase life. Flowering runs June to October.

Yes. Cosmos Purity flowers attract bees, butterflies, hoverflies, and other pollinators throughout the summer, supporting garden biodiversity alongside their visual appeal. It is filed here as a nectar flower, which is the catalogue's way of saying it is worth growing for bees and other pollinators.

Yes — this is a straightforward packet to give, and what makes it work as a gift is mostly timing. Sowing runs March to June, so a packet given inside that window can go straight in, and one given outside it keeps perfectly well until the season comes round.

There are approximately 40 seeds in the packet. On effort it looks after itself, which matters if you are giving it to someone new to growing. It suits beds, borders, cut flower gardens and pollinator-friendly spaces, so it works for a small space as well as a garden.