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Home>Flowers, Plants & Shrubs>Flower Seeds>Half-Hardy Annual Seeds

Cosmos bipinnatus 'Sensation Mixed'

Just £2.69

Half-Hardy Annual
What is Half-Hardy Annual?
A plant that completes its entire life cycle (growth, reproduction, death) in one season.
Can be grown outdoors but requires winter protection from frosts and temperatures below 0C.
5 Reviews
1 packet (80 cosmos seeds - seed tape) £2.69 Despatch: within 24 hours
1 packet (200 cosmos seeds) £2.69 Despatch: within 24 hours
Description Sowing More Info Delivery Reviews

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").

Patio, Cottage Gardens, Wildlife Gardens, Cut Flower Garden


Full sun

Up to 120cm (47.2in)

Up to 60cm (23.6in)

Easy for all

Easy for all

1 Packet (80 Cosmos Seeds - Seed Tape) (TST01367)
1 Packet (200 Cosmos Seeds) (TT01367)

Sowing Months Flowering Months
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.

Sow Cosmos seed from March to May at a depth of 3mm (1/8") 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.


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 delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 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 details of any surcharges that may apply to certain destinations.

Satisfaction Guaranteed

For your complete peace of mind, our Home and Garden products may be returned to us within 30 days of purchase for a refund of the purchase price. Items must be returned unused, at your cost and in mint condition. All items carry a manufacturer's 12 month defects warranty.


Late floweing 2017-08-01

I have used these seeds for 20 years and have always been delighted with them, good sturdy plants that flower superbly till the frosts. But in 2016 they flowered very late and I wonder if there is a reason for this. All the people I gave plants to said exactly the same so it was not conditions in my garden. When they began to flower of course, superb as usual. Beware, though, they do grow very tall, as noted by a previous reviewer.

T&M replied on 2017-01-08: "Thank you for your review. We're glad you've been so happy with our seeds for so long. At your earliest convenience please contact our Customer Care Department at, one of our agents will be more than happy to look into the late flowering issue with you.

Too tall 2016-08-27

These seeds germinated well and produced strong plants however their height far exceeded that described and they have grown to 160 - 200 cm. As a result they are in the wrong position in the border and are blocking they view of other flowers. Disappointing.

T&M replied on 2016-08-28: Thank you for your review. I am very sorry to learn of your disappointment with your purchase. At your earliest convenience please contact our Customer Care Department at, one of our agents will be more than happy to look into this further for you.

Sensational seed 2015-08-24

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!

T&M replied on 2015-08-24: Thank you for your review. It's lovely to hear you are delighted with your display.

Cosmos glory 2013-01-30

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.

Hidden Benefit 2010-04-10

Easy to grow. Plant them into a sunny spot and you'll have lots of flowers. Can get blown about because of their height and delicate foliage so might need staking, depending on position. Oh and the hidden benefit? They will attract Goldfinches into your garden :-D