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Cosmos atrosanguineus 'Cherry Chocolate' (PBR)

Cosmos atrosanguineus

Half-hardy Perennial

What is Half-Hardy Perennial?

Second place in 2024's RHS Chelsea Flower Show Plant of the Year competition

Unique colour breakthrough

Large, cherry-wine red flowers

Loved by bees and butterflies

Chocolate scented flowers

Largest flowers of any atrosanguineus variety- 7cm in diameter

Long flowering period - June to first frosts

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Description How to Grow More Info Delivery

A unique colour break for Cosmos atrosanguineus! Cosmos ‘Cherry Chocolate’ is a perennial variety with cherry to wine red petals. Sumptuous and velvety, the flowers will lure you in with their chocolately smell, as well as luring a wealth of butterflies and other pollinators. This wonderful Cosmos commences flowering in June and often continues for up to 4 months, extending the garden display into September. The blooms float on long stems above neat clumps of narrow foliage and are suitable for cutting. This half-hardy perennial makes a long-lasting display for a patio container where you can enjoy its chocolate aroma up close. It is also an excellent choice for a wildlife-friendly garden.

Container-grown plants should be moved under protection over winter. In mild areas and coastal climates Cosmos ‘Cherry Chocolate’ can also be planted in a warm, sheltered border and treated in the same way as Dahlias.

Height: 60cm. Spread: 40cm..

Plant height and spread is seasonal therefore we list by pot size rather than a defined plant size. The height and spread of the plant delivered will vary depending on the season, meaning arrival images are an indication only.

Height Up to 60cm (24in)
Spread Up to 40cm (16in)

Half-hardy Perennial

full sun

Flowering Months
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1 x 9cm Potted Plant (KF8794)
3 x 9cm Potted Plants (KF8795)
1 Jumbo Plug Plant (KF8936)
3 Jumbo Plug Plants (KF8937)
6 Jumbo Plug Plants (KF8938)

Pot up cosmos plants and grow them on in warm, frost free conditions until large enough to plant outdoors. When all risk of frost has passed, gradually acclimatise cosmos plants to outdoor conditions over 7 to 10 days before planting out in beds, borders and containers. Choose a position in full sun on any moist, well drained soil.

Feed and water cosmos plants regularly throughout the growing season. Deadhead faded cosmos flowers to encourage more blooms to be produced.

Cosmos atrosanguineus is generally grown as an annual but in very mild areas it may be perennial. It can be over-wintered if grown in containers and kept in frost free conditions. Keep the compost barely moist during the winter months. Plants should be watered freely as they come back into growth the following spring, and moved outside after all risk of frost has passed. Alternatively, lift the tubers before first frosts and store in trays of barely moist peat. Keep them somewhere cool but frost-free over winter.

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £6.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £7.99 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.

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