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
Summer Mini Course
Learn how to grow, harvest & arrange beautiful cut flowers
In our three-part video series, you’ll learn a simple step to double the number of blooms your plants produce, how to cut and care for your flowers for the longest vase life, and how to make mixed bouquets quickly and efficiently.
