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Flowers A–Z

Cosmos

Black Beauty cosmos

Cosmos atrosanguineus · Cut flowers

How to recognise Black Beauty cosmos, when it is in season and how to keep it fresh.

Season: Summer to early autumn (British field season) J F M A M J J A S O N D
Vase life: 5–7 days
Storage: Yes, store at around 2–4°C when not on display.

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How to recognise it

Dark maroon to near-black single bloom with velvety petals
Thin wiry dark green stems
Fine, feathery divided foliage
Chocolate-like scent from the flower
Open daisy-like flower form with a central disc

Care

Strip any foliage that would sit below the waterline and recut stems at an angle before placing in clean water. Use fresh flower food and keep away from ripening fruit as it is sensitive to ethylene. Keep in a cool spot out of direct sun and draughts, and change the water every couple of days.