Cosmos ‘Purity’
Cosmos bipinnatus
Description
If you want a perfect pure white, single-flowered variety, then look no further. This cheerful daisy-like bloomer is an excellent choice. Of all the annual plants you can grow in your cutting garden, few are more productive per square foot than cosmos. The more you cut, the more they bloom.
Details
Plant type: annual
Height: 42 to 48 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Height: 42 to 48 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Seed Sowing & Growing Notes
Start seed indoors in trays 4 to 6 weeks before last frost; transplant out after all danger of frost has passed. Cosmos can also be direct-seeded once the weather has warmed.
Harvesting/Vase Life
Harvest when buds are just cracking, but haven’t fully opened. For double varieties, let open halfway before picking. Expect a vase life of 5 to 6 days.
Details
Description
If you want a perfect pure white, single-flowered variety, then look no further. This cheerful daisy-like bloomer is an excellent choice. Of all the annual plants you can grow in your cutting garden, few are more productive per square foot than cosmos. The more you cut, the more they bloom.
Details
Plant type: annual
Height: 42 to 48 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Height: 42 to 48 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Seed Sowing & Growing Notes
Start seed indoors in trays 4 to 6 weeks before last frost; transplant out after all danger of frost has passed. Cosmos can also be direct-seeded once the weather has warmed.
Harvesting/Vase Life
Harvest when buds are just cracking, but haven’t fully opened. For double varieties, let open halfway before picking. Expect a vase life of 5 to 6 days.
Sources
How to Grow
Sources
How to Grow
Fall Mini Course
Learn how to successfully dig, divide & store dahlias for an abundance of blooms year after year
In our free, three-part video series, you’ll learn how and when to dig up your dahlia tuber clumps, how to divide dahlias to multiply your stock, and how to successfully store dahlias for an abundance of blooms year after year.
