Join the RHS today and support our charitable work
Keep track of your plants with reminders & care tips – all to help you grow successfully
For the latest on RHS Shows in 2021, read more
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.
Other common names
palm-leaf marsh mallow
Althaea are annuals or perennials with strong, wiry stems and broadly oval, lobed leaves. Sprays of small, pink to bluish-purple, five-petalled flowers are produced from summer to autumn
A. cannabina is an erect, woody-based herbaceous perennial with strong stems, up to 2m high, hairy, lobed leaves, up to 35cm long, and cup-shaped flowers, 3-5cm across. Flowers appear singly or in clusters on long stalks from the leaf axils and are lavender-pink with dark pink-purple anthers, from midsummer to early autumn
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect West-facing or East-facing or South-facing
MoistureMoist but well-drained, Well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
Will tolerate a wide range of situations, and rarely needs staking; for best results grow in fertile, moist but well-drained soil in full sun
Propagate by seed or by division
Suggested planting locations and garden types
Flower borders and beds Wall-side Borders Low Maintenance
Wildlife Gardens City & Courtyard Gardens Cottage & Informal Garden Mediterranean Climate Plants
Pruning No pruning required, but stems can be cut to the ground once flowering is over
Pests May be affected by flea beetles
May be affected by hollyhock rust
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.