Botanical Name: Cosmos sulphureus
Family: Asteraceae
Native: Mexico
Hardiness: Annual
Plant Dimensions: 4'–5' tall
Variety Information: 1–1½" bright, scarlet/orange blossoms
Exposure: Full sun
Bloom Period: Summer to frost
Attributes: Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Drought Tolerant
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 Cosmos Seeds Reviews
Most fun cosmos!





Beautiful blooms on tall plants, even in only 4 hours of sun





Diablo Cosmos seeds





Beautiful and sturdy





Gorgeous Flowers





Diablo Cosmos





Gorgeous, huge pollinator magnets





Diablo cosmos





One of the best Cosmos





Amazing Plants With Beautiful Flowers





Beautiful flowers





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