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Cosmos

At Gurney's, we appreciate flowers that are easy to grow, are very low maintenance and attract pollinators and butterflies. That's one reason we love cosmos. We've grown several varieties in our test gardens and offer cosmos seeds for sale that are colorful and top garden performers.

Cosmos Seeds for Sale from Gurney's

Choosing the Right Cosmos Flowers

Before you buy cosmos seeds, take into consideration your garden space. Cosmos flowers prefer full sun (6 or more hours of direct sunlight daily). They'll tolerate average soils and even some dry spells. Some can grow quite tall, 4 ft. or taller, and need protection from high winds. Others are shorter and easier to fit into smaller spaces. Finally, when selecting cosmos plants for sale or cosmos seeds for sale, consider the flower color.

Cosmos Seeds: Getting the Most out of Your Purchase

Native to Mexico, cosmos are grown as annuals in most parts of the country, but can be grown as perennials in zones 9 and 10. These showy flowers are a great addition to mixed flowerbeds, cutting gardens, cottage gardens and naturalized areas.

Getting Started with Cosmos

With very little maintenance, cosmos can provide months of colorful flowers from summer to frost--and they attract butterflies.

When to Plant Cosmos Seeds

Cosmos flower seeds can be directly sown in the ground after all danger of spring frost has passed, and the soil temperature is 65 degrees. To get a jump-start on the cosmos flowering season, some gardeners in northern parts of the country start cosmos seeds indoors and transplant them to the garden after the danger of frost has passed.

How to Plant Cosmos Seeds

The seeds can be raked into the soil. They should be planted 1/4 to 1/2 inch deep. Avoid planting too deeply because they won't germinate. Water thoroughly. Cosmos seeds will usually germinate in 7-14 days.

How to Grow Cosmos Flowers

To encourage plants to rebloom, cut or deadhead the flowers. Leave some of the seed heads on the plants. They provide food for birds, and will also fall to the ground and reseed, increasing your flower display.

How Fast Does Cosmos Bloom

Whether you direct sow cosmos seed in the garden or sow the seeds indoors and transplant them to the garden, cosmos will usually bloom about three months after the seed is sown.

When to Harvest Cosmos Seed

If you want to save seeds for replanting in the coming year, wait until the cosmos flower dies back. Then cut the dried flower. Remove the seeds from the pod and allow to dry in a cool, dry place for about six weeks.