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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
lilac 'Katherine Havemeyer'
Syringa can be deciduous shrubs or trees, with simple, entire or rarely pinnate leaves and conical panicles of small, very fragrant, 4-lobed tubular flowers in late spring or early summer
'Katherine Havemeyer' is an upright medium-sized deciduous shrub becoming spreading with age, with mid-green, heart-shaped leaves and compact panicles of fragrant, double, lavender-purple flowers which fade to lilac-pink
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect North-facing or East-facing or South-facing or West-facing
Exposure Sheltered or Exposed
MoistureWell-drained, Moist but well-drained
SoilLoam, Chalk, Sand, Clay
Time to ultimate height
Easy to grow in most well-drained, fertile, humus-rich alkaline to neutral soils. Thrives in chalky ground and appreciates mulching when planted in full sun
Propagate by softwood cuttings or layering in early summer. Grafting can be done in winter and chip budding in summer
Suggested planting locations and garden types
Pruning Pruning group 1. Tolerates hard renovation pruning
Pests Can get lilac leaf-mining moth and thrips
May be affected by lilac blight and honey fungus
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.