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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.
© RHS 2002
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Other common names
Tweedia is a scrambling evergreen subshrub with weakly twining stems bearing simple, hairy leaves and loose axillary clusters of star-shaped, 5-petalled flowers
T. coerulea is a scrambling or twining evergreen sub-shrub to 1m or more, with oblong to lance-shaped leaves and small clusters of 5-petalled, sky-blue flowers 2.5cm across
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
MoistureWell-drained, Moist but well-drained
SoilLoam, Chalk, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
Under glass grow in loam-based compost in full light; water freely in summer but keep just moist in winter. Can be grown outdoors in light, fertile, well-drained soil in frost-free area; can be treated as an annual in frost prone areas. Provide support for the climbing stems
Propagate by seed sown at 15°C in spring or strike softwood cuttings in summer with bottom heat
Suggested planting locations and garden types
Wall-side Borders Cut Flowers
City & Courtyard Gardens Patio & Container Plants
Pruning Pruning group 13 in early spring
Pests Generally pest free
Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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Join the RHS today and get 12 months for the price of 9