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.

Rollover image for an enlarged view

Cosmos bipinnatus 'Sensation Mixed'

Half-hardy Annual

 Customer Rating

A tall, upright variety for the back of sunny borders. Cosmos 'Sensation Mixed' produces masses of daisy-like flowers above delicate ferny foliage throughout summer and autumn. The strong stems and long lasting flowers of this easy to grow annual make it perfect for cutting. This fabulous mix contains a superb range of colours including white, pink and carmine. Height: 120cm (47"). Spread: 60cm (24").

Ideal For:
patio, cottage gardens, wildlife gardens, cut flower garden
Flowering Period:
July, August, September, October
Sowing Months:
March, April, May
full sun
    • 1 packet (80 cosmos seeds - seed tape)

    • Despatch: By end of May 2016
    • £2.99
    • 1 packet (200 cosmos seeds)

    • Despatch: By end of May 2016
    • £2.69

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") pots and 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.

  1. Sensational seed

    By Jean Gilbride 24-08-2015

    Grew these for the first time this year, and it won't be the last! I have been very impressed with the performance of this Cosmos. I planted them in a group at the top of my garden and they have become my favourite plant - even out performing my Sweet Peas!


    Thank you for your review. It's lovely to hear you are delighted with your display.

  2. Cosmos glory

    By jo Sadler 30-01-2013

    We bought seeds and had no problem germinating them successfully. They were easy to prickout and we got a fantastic amount of plants from them. They grew extremely well considering the poor weather and had to stake them for last part of sumer. They grew taller than me- 5foot 6 and flowered brilliantly right through until October. They created a fantastic hedge of green and pink and white flowers ,and great for back of border as a filler or feature.,They areexcellent for cutting too and will be purchased again and again.

Post a review
Title of review

Rating 1 2 3 4 5
You will be redirected to login/registration page to post your review.
Reviews are subjected to approval.