What to Expect
Let the planting develop.
A tall annual, generally 36–60 inches, with white flowers through summer and fall. Height and bloom timing vary with soil, climate, and care.
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Purity White Cosmos · Cosmos bipinnatus ‘Purity’
Purity White Cosmos
A little grace. A lot of white.
Purity White Cosmos gives the garden room to breathe. Pure white petals, golden centers, fine foliage, and long stems create a loose, light-filled planting that moves with the breeze. Grow it along a sunny border, through a meadow-style patch, or in a cutting garden for easy, airy bouquets. Lean soil and regular picking suit this generous annual beautifully.
$19.95 · 2 oz2 oz approximately 500 sq ftFree U.S. shipping at $35+. Shipping details
Coverage2 oz approximately 500 sq ft · 4 oz approximately 1,000 sq ft · 8 oz approximately 2,000 sq ft · 1 lb approximately 4,000 sq ft
SunlightFull sun and well-drained soil.
When to PlantDirect sow after frost danger has passed and the soil has warmed.
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Free U.S. shipping at $35+. Eligible lightweight orders under $35 can ship by Economy tracked mail for $2.95; other sub-$35 orders ship for $5.95. Use code BUMBLEBEES for 5% off when you buy 2 or more eligible non-packet ready-made seed items. The items may be the same or different. Seed packets, Seed Studio custom mixes and stickers do not qualify and are not discounted. Packets still count toward $35 free shipping. Product-specific discounts do not stack; the better discount applies.
2 ozSKU: CPUR-2OZ · Pure seed · no grass or filler
$19.954 ozSKU: CPUR-4OZ · Pure seed · no grass or filler
$32.958 ozSKU: CPUR-8OZ · Pure seed · no grass or filler
$54.951 lbSKU: CPUR-1LB · Pure seed · no grass or filler
$89.95
The flower collection
A little grace. A lot of white.
Purity White Cosmos gives the garden room to breathe. Pure white petals, golden centers, fine foliage, and long stems create a loose, light-filled planting that moves with the breeze. Grow it along a sunny border, through a meadow-style patch, or in a cutting garden for easy, airy bouquets. Lean soil and regular picking suit this generous annual beautifully.
- Annual flower · 36–60 inches.
- Full sun · good drainage.
- Direct sow after frost danger has passed and the soil has warmed.
Purity White Cosmos
Cosmos bipinnatus ‘Purity’
How to Plant
Prepare, sow, and press.
Before broadcasting, thoroughly mix this individual seed with dry sand, vermiculite, or another clean, dry carrier. A carrier is strongly recommended for most individual species and is especially important for small or lightweight seed. Sow about 1/8 inch deep in prepared soil. Keep evenly moist through germination, then thin to 12–18 inches apart. Choose well-drained, relatively lean soil; excessive fertilizer can favor leaves over flowers. Support tall plants in exposed locations.
Read the complete planting guide →Plant with confidence