White Cosmos Collection

The semi-double flowers of ‘Psyche White’ and the large, open flowers of ‘Purity’ make a winning combination of pure, crisp white. Grow them together for vases full of flowers all summer long. More
2 packets of seed 140060 £2.50 In stock
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Items will be despatched in 5-7 working days.
10 seedlings 190553-10 £9.50 Delivery mid April
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When in stock, please allow up to 1 week for delivery.
20 seedlings 190553-20 £17.50 Delivery mid April
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When in stock, please allow up to 1 week for delivery.
More Details

The semi-double flowers of ‘Psyche White’ and the large, open flowers of ‘Purity’ make a winning combination of pure, crisp white. Grow them together for vases full of flowers all summer long.

This collection contains 5 or 10 seedlings each of:

Genus Cosmos
Group/Species bipinnatus
Variety Psyche White, Purity
Type Half-Hardy Annual
Common Name Cosmos
Border Position Middle
Soil Type Fertile, Neutral
Scent Unscented
Site Full Sun
Moisture Moist but Well-drained
Height 90-120cm (35-47in)
Spacing 40cm (16in)
Sowing, Seeds, Planting Plant out in spring after risk of frosts.
Care Tips May need staking, pick or deadhead regularly to prolong flowering
Flowering June - October
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
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,...

Direct sowing seeds

Learn how to get great results when direct sowing hardy annual seeds.

Delivery

Plant Delivery - When in stock, please allow up to 1 week for delivery.

Seeds Delivery - Items will be despatched in 5-7 working days.

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

White Cosmos Collection reviews

* * * * * Average based on 20 reviews

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Reviewed 10th November 2018 by Sally

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Reviewed 8th November 2018 by Patricia

I buy white cosmos every year as they are one of my favourite plants. The service and packaging from Sarah Raven is spot on and I've never been unsuccessful with my purchases.

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Reviewed 8th November 2018 by Marie

Beautiful but have not grown as well as last year and most are only flowering now!!

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Reviewed 7th November 2018 by Pat

Cosmos still in flower in November and het lots of compliments. I prefer the single flowers..they seem stronger plants.

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Reviewed 7th November 2018 by Wendy

THey were good strong plants and they flowered continuously despite the hot summer. ARrived in good condition.

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Reviewed 7th November 2018 by Bren

Arrived quickly and in good condition. They have flowered beautifully and consistently until the first frost.

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Reviewed 7th November 2018 by Dorothy

Very well packaged in degradable materials.The Cosmos have been AMAZING - still have a few flowers in the garden
Would definitely purchase again next year

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Reviewed 7th November 2018 by Sarah

After a slow start in the hot weather, they grew and grew until they were like trees. Trouble is , they were impossible to support and outgrew their allotted space in the border! However they were still trying to flower until the first frost in early November.

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Reviewed 31st October 2018 by Tina

As always, lovely healthy cosmos, but there were some pale pink ones amongst them. I appreciate you cannot always be sure of their genus!

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Reviewed 11th October 2018 by Sue

A lot of vegetative growth but when they started flowering, good show.

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Reviewed 3rd October 2018 by Brenda

Still flowering after dead heading frequently.

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Reviewed 3rd October 2018 by Gill

Lovely still flowering have enjoyed

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Reviewed 3rd October 2018 by John

Bulbs ecxellent Cosmos a bit disapointing

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Reviewed 23rd September 2018 by Evelyn

Lovely little plants, beautifully packaged arrived during one of the hottest and driest summers recently, (and I live in the low rainfall area of SE England.) Plants were repotted and, later, planted in my showy, patio border. The white cosmos grew and flowered well. The Cranberry ones, doubles, sulked and faded. The plants were well watered and many gave up. The whites have given me many pickings of long stemmed blooms together with feathery grasses. I shall try again next year. Eve Griggs

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Reviewed 19th September 2018 by Patricia

The seedlings arrived healthy, well packed and in good condition.
Since planting they went from strength to strength and have flowered profusely all the summer and appeared to like the hot weather (with regular watering). They are still flowering and the plants are tall and sturdy. I have decided to buy these again as despite a lot of effort on my part, I don’t appear to grow such successful plants.

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Reviewed 19th September 2018 by Susan

I was pleased with the swellings when they arrived, well packed and in good condition. They were potted on but had to wait a long while for any flowers, so didn't quite get the display hoped for, maybe due to the hot weather. Also scented geraniums have hardly flowered, 3 in a big pot, also pelargonium Lord Bute didn't grow well, only flowered in the last 6 weeks.

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Reviewed 3rd September 2018 by Sarah

The cosmos grew too large and woody. Poor flowering. Didn’t look great in pots. Wont get them again.

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Reviewed 29th August 2018 by Wendy

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Reviewed 29th August 2018 by Juliet

I ordered all the seedlings for wedding flowers. They all bloomed at the right time and were fantastic

Lovely

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Reviewed 4th October 2017 by Marie Clements

This has been a lovely collection. The flowers have been delicate and prolific all summer. As I said in my review for the Cosmos and Nicotiana Collection it would be great if Sarah could add a bit in her video about how to pinch out Cosmos plants so they don't get too tall as mine have got quite tall (needing tall canes) and bushy - please don't assume we all know which bits to pinch - but despite my lack of pinching out they have flowered wonderfully and been a delight all summer and still have flowers now in first week of October. Very simple to grow on and plant out in both beds and pots. Dead heading is easy once you have watched Sarah's helpful video. A rewarding plant for the newby gardener. I would definitely buy this collection again.