Thompson & Morgan

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Cosmos bipinnatus 'Rubenza'

Half-hardy Annual

 Customer Rating
Wonderfully easy-to-grow plants which flower all summer until the first frosts. The dark, ruby-red blooms of Cosmos bippinatus Rubenza change to a lovely traditional rose red as they mature - their outstanding colour has earned them a Fleuroselect Novelty award. Cosmos bippinatus Rubenza shows excellent garden performance, especially planted in borders in drifts.

Ideal For:
patio, cottage gardens, wildlife gardens, cut flower garden
Flowering Period:
July, August, September, October
Sowing Months:
March, April, May
Position:
full sun
    • 1 packet (60 seeds)

    •  
    • Despatch: Within 3 days
    • £2.99

Sow Cosmos seed from March to May at a depth of 3mm (⅛") in a good quality seed compost, and cover the seeds with a very fine sprinkling of vermiculite. Place the seed tray in a propagator at a temperature of 18-25C (64-77F) or seal it inside a polythene bag. Keep the soil damp but not wet. Do not exclude light as this aids germination which usually takes 7-15 days.


When seedlings are large enough to handle, transplant into 7cm (3") potsand grow them on in cooler conditions until large enough to plant outdoors. When Cosmos plants are well grown and all risk of frost has passed, acclimatise them to outdoor conditions over 7 to 10 days. Transplant outdoors in full sun in any moist, well drained soil at a distance of 45cm (18") apart. Pinch out the growing tip of each stem when transplanting to encourage stems to branch and produce more Cosmos flowers.

When growing Cosmos plants, water regularly until they are fully established. Deadhead faded Cosmos flowers regularly to encourage more blooms to be produced throughout the summer.

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.

Reviews
  1. Cosmos Rubenza

    By Angela Littler 13-10-2013

    This is my second year of growing this variety. Beautiful, long-lasting and a fabulous colour. If you deadhead regularly, they last well up to the frosts - mine still blooming and producing buds on Oct 13.

  2. Cosmos Rubenza

    By DHIREN SINGH HEISNAM 02-04-2013

    tHE best cosmos for UK weather. I got it last year 2012 and the summer was fantastic. It bloomed till mid autumn. Very floriferous and generous . The change in colour is fascinating and makes my days.

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