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All ratings refer to the UK growing conditions unless otherwise stated. Minimum
temperature ranges (in degrees C) are shown in brackets
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.
Forest Blue is a bushy, spreading deciduous shrub to 60cm tall, with lance-shaped leaves turning red in autumn, and small clusters of rich blue, plumbago-like flowers 2cm wide in late summer and autumn
C. willmottianum is a small deciduous shrub with lanceolate leaves to 5cm in length, turning red in autumn. Flowers 2.5cm in width, rich blue, in dense terminal clusters
P. indica is an evergreen shrub of lax, scandent habit, with slender stems carrying ovate leaves and terminal racemes of deep rose-pink flowers 2cm across, in autumn or winter
P. auriculata is an evergreen shrub to 4m or more (with support), with slender, scandent stems bearing light green, spoon-shaped leaves and terminal racemes of sky-blue, long-tubed flowers 15mm across
C. griffithii is a semi-evergreen, woody sub-shrub with attractive, bristly foliage outlined in purple-brown, clusters of blue flowers in late summer and autumn, and good autumn colour
C. plumbaginoides is a low-growing herbaceous perennial with spreading roots, forming a mat of stems bearing oval leaves which turn red or purple in autumn. Clusters of rich blue flowers from late summer
P. auriculata f. alba is a lax evergreen shrub with slender stems bearing light green, oblanceolate leaves and terminal racemes of pure white flowers in late summer and autumn
Last-listed in the RHS Plant Finder in 2000
This plant is listed in the RHS Plant Finder book. At present our information about this plant is limited to a list of the nurseries that supply it. In time we will be adding more details including a description, growing information, advice and photographs.
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