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Sign up freeCosmos bipinnatus
Tall, airy annual with fern-like foliage and daisy flowers. Tolerates poor soil — too much fertility produces leaves at the expense of blooms. Self-sows readily; leave some heads to drop seed.
Echinacea purpurea
flower
A fellow Asteraceae — similar growing habits to Cosmos
Start Cosmos indoors about 6 weeks before your last frost. Seeds usually come up in around 10 days. Move seedlings out once the danger of frost has passed, in full sun, spaced about 30 cm apart. Expect the first blooms in roughly 70 days.
Cosmos seed rarely stays viable beyond 4 years — track what's still worth sowing.
Water: Low · Height: 120 cm · Soil: Well-draining, light soil. Tolerates poor to moderate fertility. pH 6.0-7.5. Avoid heavy, wet soil.
These three thrive alongside Cosmos — and alongside each other.
