Thompson & Morgan

Important delivery notice
The products on this site are only delivered to UK addresses. If you require delivery to another country please visit one of our other sites below.

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Cosmos atrosanguineus 'Dark Secret' (Large Plant)

Bidens atrosanguinea, Chocolate Plant

Half-hardy Perennial

Chocoholics need to stop right here- Chocolate Cosmos flowers have the ultimate chocolate fragrance! The flowers are just as sensual in their appearance- in deep maroon, and held aloft neat clumps of foliage.

Chocolate Cosmos can be used in many different ways in the garden; as a container plant, border plant or bedding plant. Plants enjoy hot summers, and are quite drought tolerant.Height and Spread: 50cm (19").


Lifetime Guarantee on Hardy Plants Large Potted Plant Special Offer

Ideal For:
patio, cottage gardens
Flowering Period:
June, July, August, September
sun or semi shade
    • 1 x 1 litre potted cosmos plant

    • Despatch:
    • £9.99
    • Out of stock
    • 2 x 1 litre potted cosmos plants

    • Despatch:
    • £16.99
    • Out of stock
Chocolate Cosmos plants will enjoy 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 ‘Chocamocha’ 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 and will be stated on the product page or in your order acknowledgement page and email.

Orders for packets of seed incur a P&P charge of £1.95.
Orders which include any other products will incur a P&P charge of £4.95.
Where an order includes both packets of seeds and other products a maximum P&P charge of £6.90 will apply - regardless of the number of items ordered.

Please see our Delivery / P&P page for further details and details of any surcharges that may apply to certain destinations.

  1. Disappointed

    By Ann Waldron 03-05-2015

    Plant arrived with no signs of green at all. Waited a few days and sent email of plant . Phoned them to advice thought plant was not as,described on web site. Was advise to wait 14days to see what happened !!!!! Now over a month and plant in greenhouse and watered . About 1inch of green growth. At £9.95 expected better from plant and company


    Thank you for your review. I am very sorry to hear of your disappointment with your purchase. If you would like to contact our Customer care team on, one of our agents will be happy to investigate this matter further.

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