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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
Mexican paintbrush 'Hawaii White'
Ageratum can be annuals, perennials or shrubs, usually bushy in habit, with simple ovate leaves and small fluffy blue, pink or white flower-heads in summer and autumn
'Hawaii White' is a compact, mound-forming annual with fluffy heads of white flowers opening over a long period from mid summer to late 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 South-facing
MoistureMoist but well-drained
SoilSand, Loam, Clay, Chalk
pHAlkaline, Neutral, Acid
Time to ultimate height
This genus is ideal edging for bedding schemes, but in addition 'Blue Danube' is compact enough to be grown in a container, bearing weather-resistant flowers on young plants. To prolong flowering, keep soil or growing media moist.
Propagate by seed
Suggested planting locations and garden types
Flower borders and beds Garden Edging
City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants
Pruning No pruning required
Pests Generally pest free
Generally disease free
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.