Cosmos ‘Psyche White’
Cosmos bipinnatus
Description
These large, pure white blooms are a mixture of single and semi-double flowers. The ruffled petals look like snowflakes dancing in the breeze. A fun addition to the cutting garden or flower border and one of the easiest and most productive cut flowers per square foot you can grow.
Details
Plant type: annual
Height: 36 to 42 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Height: 36 to 42 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
These large, pure white blooms are a mixture of single and semi-double flowers. The ruffled petals look like snowflakes dancing in the breeze. A fun addition to the cutting garden or flower border and one of the easiest and most productive cut flowers per square foot you can grow.
Details
Plant type: annual
Height: 36 to 42 in
Site: full sun
Days to maturity: 75 to 90 days
Plant spacing: 12 in
Pinch: when 8 to 12 in tall
Height: 36 to 42 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
Winter Mini Course: Seed-Starting 101
Learn how to start flowers from seed in this three-part video series
In our upcoming Winter Mini Course, you’ll learn everything you need to know to successfully start flowers from seed, including all of the necessary supplies, step-by-step instructions, special tips and tricks, and how to create a simple indoor seed-starting area.
