Cosmos Seeds

Grow vibrant, long-lasting flowers in your garden with high-quality cosmos seeds from D.T. Brown. With their vibrant petals and elegant fern-like foliage, cosmos are the quintessential summer bloomers – great for attracting bees and butterflies. These versatile half-hardy annual seeds come in a huge array of colours, from pastel pinks, yellows, and whites to vivid magentas and reds.

Perfect for flower beds, borders, pots, and containers, cosmos are some of the most rewarding flower seeds to grow. They’ll fill your garden with fantastic colour from early summer to the first frosts, offering copious cutting opportunities. Whether you’re looking for classic daisy-shaped single blooms or frilly doubles, our fantastic selection of cosmos seeds has something for every gardener.

Growing Cosmos from Seed

Cosmos are half-hardy annuals prized for their large, artistic blooms in a kaleidoscope of colours. Our range of cosmos seeds includes favourites from the pretty pink-edged Candy Stripe to the whimsical Snow Puff, with its masses of white pom-pom style flowers.

One of the biggest draws of these Mexican natives is just how easy and rewarding they are to grow from seed. Cosmos enjoy full sun and do well in most soils, gracing borders, beds, and pots with beautiful blooms from June to October.

Sow your cosmos seeds indoors from February to April before hardening off and planting out in late May. In as little as 12 weeks from sowing, you'll be enjoying the first flushes of spectacular, dense blooms. We also carry a range of garden-ready cosmos plants.

Order Your Cosmos Seeds Today

At D.T. Brown, we are passionate about helping UK gardeners create beautiful, thriving gardens. All of our flower seeds, from sun-loving cosmos to winter flowering plants, are quality tested to ensure high germination rates – 100% satisfaction guaranteed.

Begin your flower-growing adventure today with D.T. Brown. Order now and enjoy fast UK delivery, with P&P from just £1.95 on seed-only orders.