Join the RHS today and support our charitable work
Keep track of your plants with reminders & care tips – all to help you grow successfully
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Free entry to RHS members at selected times »
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Help us achieve our goals
Join the RHS today and support our charity
We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
the RHS today and get 12 months for the price of 9
Other common names
cosmea [Cupcakes Mixed]
Cosmos can be annuals or perennials with simple or pinnately divided leaves and large, long-stalked daisy-like flowers in summer
Cupcakes Mixed are erect, bushy annuals up to 90cm high, with very finely-divided green leaves and flowers from about midsummer to the first frost. The distinctive flowers, 10-12 cm across, have the outer rays fused together around the yellow centre to form a bowl; the flowers may be single or semi-double, and the outer rays may be white, pale pink, or pink with darker pink at the base
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or West-facing or East-facing
MoistureMoist but well-drained
SoilLoam, Chalk, Sand, Clay
pHNeutral, Acid, Alkaline
Time to ultimate height
Sow seed in spring and plant out from early summer, at 50cm spacing, in moist but well-drained soil in full sun
Propagate by seed in mid-spring: sow at 18-22°C, cover lightly with vermiculite, after germination reduce the heat to 10-15°C, and plant out when any risk of frost is over
Suggested planting locations and garden types
Flower borders and beds Cut Flowers
Cottage & Informal Garden City & Courtyard Gardens
Pruning No pruning required except deadheading to prolong the flowering season
Pests May be affected by aphids
May be affected by grey moulds
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.