100 seeds 030160 £2.95 In stock
When in stock, please allow 2-3 days for despatch.
20 seedlings 510816-20 £22.95 Delivery early June
When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.
40 seedlings 510816-40 £41.50 Delivery early June
When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.
20 jumbo seedlings 510816-SP20 £29.95 Delivery mid June
When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.
More Details

We can't get enough of these fantastic flowers and they make a great collection.

This collection contains a mixed packet of seeds, 5 or 10 seedlings, or 5 jumbo seedlings each of:

Group/Species bipinnatus
Type Half-Hardy Annual
Border Position Cutting Garden
Soil Type Broad Tolerance
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained
Height 90cm (36in)
Spacing 40cm (16in) apart, 20 seedlings fills 6m² (ie 6m x 1m border, or 3m x 2m patch)
Sowing, Seeds, Planting Sow under cover March-April at about 3mm deep in good compost. Transplant out after first frosts, and water in until fully established or direct sow April-June. Grow seedlings on in individual pots or modules until large enough to plant out. Gradually acclimatise to outdoor conditions for 7-10 days before transplanting into the garden after all risk of frost has passed.
Care Tips Pinch out tips at 15-20cm to encourage bushier plants. Stake and tie Cosmos plants if necessary during the growing season, water regularly and dead-head to prolong the flowering season.
Flowering July - October
Vase Life Last 7-10 days, no conditioning needed. Pick fresh straight into water, just as the buds are about to bloom, and do not pick in the heat of the day. Deadhead the main blooms that are drooping and going over after about a week. Place out of direct sunlight.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
Advice & Videos
A year in my cutting garden - May

I have started to take a monthly look at the goings on in my Cutting Garden...

How to plant and grow cosmos

Even if you only have a tiny garden – or just some pots – you have to grow at least one cosmos. They are the lowest maintenance,...

Cosmos summer flower arrangement

In this video, Sarah shows you how to put together a lovely roadside-inspired Cosmos 'Purity' flower arrangement.


Plant Delivery - When in stock, please allow up to 3-4 weeks for despatch. For fruit & veg bare roots/crowns, please allow up to 2 weeks for despatch.

Seeds Delivery - When in stock, please allow 2-3 days for despatch.

Click here to find out more information about our delivery rates and times.

Ultimate Cosmos Mix reviews

* * * * * Average based on 40 reviews

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Reviewed 22nd April 2020 by Dawn

Excellent they arrived in perfect condition

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Reviewed 22nd April 2020 by Jacqueline

As above all good and healthy

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Reviewed 21st April 2020 by Michael

As above ! Plants potted on very well.

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Reviewed 20th April 2020 by Peter

Very much so, arrived safe and sound in excellent condition, have been transplanted now we wait

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Reviewed 20th April 2020 by Siobhan

Really healthy little plants, very happy

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Reviewed 20th April 2020 by Therese

Healthy plants, packaged well

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Reviewed 5th August 2019 by Mrs Pimley

Good sturdy plants in pots, continuous profusion of pink, red and white flowers.

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Reviewed 2nd August 2019 by Mrs Heydon

I had a lovely show of flowers. The service was fine'

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Reviewed 1st August 2019 by Gillian

Almost 100% germination - now flowering and many colours

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Reviewed 31st July 2019 by Jane

In great condition, took off beautifully in the greenhouse, shame the rabbits enjoyed them when planted out!

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Reviewed 31st July 2019 by Jean

Three types very good, one weak and mainly useless

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Reviewed 31st July 2019 by Fiona

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Reviewed 31st July 2019 by Louise

Gorgeous Mix brightening up my garden. (had to battle the slugs for them a bit, but as I had sown plenty, we had enough to go around for everyone!)

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Reviewed 31st July 2019 by Catherine

I’ve been pleasantly surprised by these, first time from seed, and now all growing strongly. Germination was even and almost “instant” even outside, and the slugs have left them alone preferring the dahlia seedlings beside them. No flowers yet but buds are developing now and I did pinch them out for fatter plants, nice and healthy too. All in all very happy with these.

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Reviewed 31st July 2019 by Claire

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Reviewed 31st July 2019 by Lindsay

Fantastic service and amazing plants. Have been flowering non stop.

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Reviewed 14th November 2018 by Alison

Plants were healthy when they arrived but I found the double dark ones were too heavy for the stems and so they all faced downwards therefore not a great cut flower. Will stick to Purity next time.

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Reviewed 7th November 2018 by Valerie

They were a bit spindly.!

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Reviewed 7th November 2018 by Andrew

All the Cosmos seedlings survived and flourished well to produce a good display through the summer. Have just dug them up! It was a good way to have Cosmos in the garden as the hassle of trying to grow seeds was left to you, the professionals, and I had the joy of growing them on.
Although I now have my own greenhouse I would still choose this way of ‘growing’ the more demanding of seeds.

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Reviewed 7th November 2018 by Dianne

The White Single Cosmos were absolutely amazing. There were giants that kept on flowering. Not so keen on the doubles - small and a bit messy.

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Reviewed 12th October 2018 by Margaret

Both the white and purple have done exceptionally well this summer and with continual dead-heading are still producing new flowers now in October. Will get them again next year.

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Reviewed 11th October 2018 by K M Boyce

Overall a nice mix of colour, although the sizing of the different varieties turned out slightly problematic in the garden where they were planted.

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Reviewed 4th October 2018 by Sara

The cosmos grew over a meter high, the cranberry dick and single magenta ones were fabulous ,flowered early but the white psychic only started to flower from mid August..but were large also. The ones planted in full sun were best. The hot summer helped but as soon as we had rain , they fell over but still continued to look great.

The courgettes were great fun (3 varieties) and if not eaten I used them like flowers to decorate the fruit bowl....especially when I missed some to pick and they were enormous! It was so exciting to go into the garden and see what had grown! Yellow soleil were my favourite to eat but romanesco looked great.

The acanthus were a little disappointing but may be better next year as not an annual.
Look forward to next year.....service was helpful especially when I was worried about the first few courgettes rotting.

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Reviewed 4th October 2018 by Nigel

Good quality growing seeds large plants and flowers

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Reviewed 3rd October 2018 by Jennifer

My tomatoes are still producing huge amounts of fruit. My cosmos are magnificent

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Reviewed 3rd October 2018 by Gill

Bit disappointed no pinks ones just deep pink and whites

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Reviewed 21st September 2018 by Joyce

I bought a whole bunch of plug plants and tubers in Spring, all for a clients cutting garden. I grew the plant on until they were 2/3Litre pot size. The plants were all good, strong and sturdy and I only have two that died off in around 275 plants. I was dissappointed with the dahlias though as the not all came true as per the label. I certainly didnt get the Labyrinth that I ordered.

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Reviewed 20th September 2018 by Julie

flowered all summer long!

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Reviewed 19th September 2018 by Paulina

Fantastic, still flowering profusely !!!!

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Reviewed 19th September 2018 by Gillian

They are still flowering in the middle of September

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Reviewed 13th September 2018 by Mrs Walker

Good service and plants are excellent quality

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Reviewed 12th September 2018 by Annie

Very good good colour all summer

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Reviewed 8th September 2018 by Sandy

Good on the whole but again, the drought meant they didn’t perform quite as well as they would normally. Relying on a neighbour’s watering while we were away is never easy!
Plants very healthy-looking on their arrival.

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Reviewed 4th September 2018 by Susan

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Reviewed 3rd September 2018 by MRS WOOD

The plug plants were very healthy and grew to large plants remarkably quickly. They have been covered in flowers for weeks now and are showing no signs of stopping. they are ba real shoe stopping picture.

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Reviewed 29th August 2018 by Alison

Very healthy, lots of flowers

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Reviewed 29th August 2018 by Lesley

Arrived promptly and never grown them before but am so impressed as they r so strong and keep on growing !!! Amazing ...just hope they survive the winter , great quality seedlings/plants !!!

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Reviewed 29th August 2018 by Linda

all the cosmos were lovely - but especially the white, tinted pink ones, which grew amazingly tall - and deadheading them just made them produce more lovely blooms. A big hit in my garden.

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Reviewed 29th August 2018 by Marian

Fabulous strong plants

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Reviewed 2nd June 2016 by Sue Tu!loch

I sowed these seeds 17 April, in an unheated greenhouse as I had been away (but in any case spring was so cold this year.) From one packet of 100 seeds today on 1 June I have 96 strong healthy plants that are already 20cm - 25cm tall. I a!ways buy Sarah Raven seeds as the germination rate is so good, giving me lots of plants to share with family and friends. Looking forward to masses of flowers in the summer.