Cosmos, 'Diablo'

(Cosmos sulphureus) A different species than the more common cosmos, Diablo showcases bright scarlet/orange, semi-double blooms atop graceful 4-5’ tall and 2-3' wide plants. Easy to grow and will brighten any corner of your garden. Long-lasting and blooming cut/garden flowers bloom early summer through late fall. Drought tolerant and carefree, we keep returning to these as one of our first and favorite flower varieties. Striking vivid color. Native to Mexico and introduced to English horticulture in the 18th century.
75 days. UO

Packet: 75 seeds

Product Code: COS-DI-pkt

Availability:In stock

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Growing Info


Sow indoors 4-6 weeks before your last frost.

Transplant out after last frost.

Direct seed after last frost.

Note: Dependable, long blooming, pollinator attracting, and drought tolerant.




10-18" in rows 15-18" apart.


7-14 days @ soil temp 60-75F


Full sun


Average. Prefers well-drained, and evenly moist soil but is drought tolerant once established.


Dependable and care-free, long blooming, drought tolerant, and pollinator attracting.

Requires very little save for your admiration. Excellent, airy filler or standalone bouquet.

Harvest stems or branches at bud break and expect a vase life of 5-7 days. Buds will continue to open if you cut branches.