Cosmos Sensation Mixed (Cosmos bipinnatus) – pink and white bloom against a blue sky

Cosmos Sensation Mixed

£2.50
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Cosmos Sensation Mixed (Cosmos bipinnatus) – pink and white bloom against a blue sky
RHS Plants for PollinatorsRHS Award of Garden MeritBeginner friendly

Cosmos Sensation Mixed

Cosmos bipinnatus 'Sensation Mixed' — the classic large-flowered cottage garden Cosmos

5 reviews

The benchmark cottage Cosmos — large pink, white and carmine daisies on tall stems from July to November. RHS Award of Garden Merit. The most productive cut flower in the patch.

£2.50

Free UK delivery on seed orders over £40

Dispatched from our Norfolk farm by Royal Mail, usually within one working day.

Your growing year

Sow, plant out and flowering months for this variety

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
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Dec
Sow
Plant out
In flower
SowPlant outIn flower

At a glance

Height
90–120cm
Spread
50cm
Spacing
45cm
Position
Full sun
Colour
Mixed
Seeds per packet
100
Soil
Poor, lean, UNFED soil only — the most important Cosmos growing rule
Grow guide How to grow Cosmos Sensation Mixed Read the full guide →

About this variety

The benchmark. Large single flowers, 8 to 10cm, in the full range of pinks, whites and carmines on stems of 90 to 120cm, and no other plant in a cutting patch produces this many stems per square metre.

It holds an RHS Award of Garden Merit, and it is the one to give a beginner, because it is close to unkillable given sun and poor soil. Sow in spring, plant out after the frosts, keep cutting, and it will supply a household with flowers from July until the frosts finish it in November.

Two notes on the mix. You get what you get, since there is no sorting by colour before the buds open, and the deep carmine tends to be the most vigorous, so a self-seeded colony drifts towards magenta within a few years. Pull the ones you do not want while they are small. And here is the standard cosmos warning again, because it is the thing that goes wrong most often: do not feed it, and do not plant it in good soil. Rich ground gives you a huge leafy plant and almost no flowers.

Plant alongside

Chosen by us, not by an algorithm

RHS Plants for Pollinators

This plant has been assessed by the Royal Horticultural Society and recommended as especially beneficial to bees, butterflies and other pollinators. Growing plants like this directly supports UK pollinator populations — something close to our hearts at Salle Moor Hall Farm, where we see the difference a cottage garden full of the right plants can make.

Learn more at RHS.org.uk →

RHS Award of Garden Merit

The RHS Award of Garden Merit is given to plants of outstanding excellence for ordinary garden use. To earn this award a plant must be of good constitution, available to the gardening public, and perform reliably across a range of UK growing conditions. It is one of the most trusted plant recommendations in British gardening and a genuine mark of quality.

Learn more at RHS.org.uk →
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D
Debra

Lovely packaging with excellent instructions

S
Susan

Perfect - let’s hope I can grow them

N
Nicola Miles

Beautiful

N
Nicola

Beautiful