Cosmos sulphureus is a hardy annual producing masses of bright orange, yellow, and red blooms that bring vibrant colour to the summer garden. It thrives in poor soils and hot, dry conditions, making it an easy-care choice for pollinator-friendly beds and borders.
Planting season: Spring, early summer Germination time: 7–14 days Position: Full sun, well-drained soil Time till flowering: 60–90 days Plant height: 60–120 cm
Growing instructions: Sow directly into the garden after the last frost, or start indoors for earlier blooms. Thin seedlings to 30 cm apart. Prefers poor soil—overly rich soil will reduce flowering. Deadhead regularly to extend the blooming season, or allow some flowers to go to seed for self-sowing.
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