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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:
the RHS today and get 12 months for the price of 9
Other common names
sunflower 'Lemon Queen'
Helianthus can be tall, erect annuals, tuberous or rhizomatous perennials, with coarse simple leaves and large daisy-like flower-heads
'Lemon Queen' is a strong-growing perennial to 2m tall, with coarse, dark green foliage and light yellow flowers 5cm wide, with pale yellow ray florets about a dark yellow central disk
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
SoilClay, Chalk, Loam
Time to ultimate height
Grow in a moderately fertile, humus-rich, moist but well-drained, neutral to alkaline soil in full sun. Needs a long hot summer to flower well. May need support
Propagate by division in spring or autumn
Suggested planting locations and garden types
Flower borders and beds
City & Courtyard Gardens Coastal Cottage & Informal Garden
Pruning Cut back after flowering
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.
sunflower 'Lemon Queen'
Buy from £5.99
at the RHS Plants Shop
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Join the RHS today and get 12 months for the price of 9