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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
common sunflower comb flower
golden golden flower of Peru St Bartholomew's star
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
H. annuus is a tall, fast-growing annual with broad, oval to heart-shaped, roughly hairy leaves 10-40cm long. In summer it bears huge flowers up to 30cm across with bright yellow petals and dark brownish or purplish centres. The flowers attract bees and the seeds that follow provide food for finches
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 South-facing
MoistureMoist but well-drained
SoilSand, Loam, Clay, Chalk
Time to ultimate height
Grow in a moderately fertile, humus-rich, moist but well-drained, neutral to alkaline soil in full sun. Will flower best in a long, hot summer. May need support
Propagate by seed sown in-situ or in a pots or modules in spring
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Wall-side Borders
Wildlife Gardens Cottage & Informal Garden
Pruning No pruning needed
Pests Can get slugs and snails
May be affected by powdery mildews and sclerotinia diseases
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.