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diablo seeds

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

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When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F.

When to Start Inside: 4 to 6 weeks before your average last frost date.

Days to Emerge: 5–10 days

Seed Depth: Barely cover

Seed Spacing: A group of 3 seeds every 12″

Thinning: When 1″ – 2″ tall, thin to 1 every 12″

Harvesting: For longest vase life, cut stems just as flower buds begin to open.

Diablo seeds

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Cosmos will flower all summer until the first heavy frost. Can be started indoors 3/25-4/21 or sown directly outdoors after frost (5/20-7/20). Plant seeds 1/4 – 1/2 ” deep, with final spacing 12” apart. 7 -10 days until germination at 75°F.

For long lasting cut flowers, snip stem when petals begin opening but before they have opened completely.

Cosmos are an easy seed saving crop, and may reseed in the garden. Collect seeds by hand once they have turned brown and when they are dry. Clean by winnowing. This cosmos is a different species than (and will not cross with) the pink/white cosmos types. Cosmos is insect pollinated, so plants can be crossed by bees within 1/4 mile but all orange cosmos are similar so home gardeners don't need to worry about isolation distance. Collect seeds from as many plants as possible to preserve genetic diversity.

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