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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.
'Moonlight' is a spreading evergreen perennial to 20cm tall, with ovate leaves and narrow, long-stemmed, pale creamy-yellow flowers 3cm wide in late spring and summer
H. violacea is an evergreen climber with twining stems to 2m and ovate leaves to 12cm in length. Purple, or occasionally pink or white, flowers to 10mm across are borne in pendent racemes from late winter
'Irish Molly' is a neat clump-forming perennial to 20cm tall, with ovate leaves and fragrant flowers 4cm wide, the upper petals brownish-maroon with violet and green shading, the lower one yellow with a reddish-brown marking
V. odorata is a rhizomatous perennial forming a loose mat of heart-shaped leaves with fragrant violet or white flowers 2cm across in late winter and early spring
'Deltini Rose Pink' is a small-flowered, compact pansy to around 20cm, with white flowers, 3-4cm across, shading to mid-purple on the upper petals and pale purple on the lower ones, with a yellow eye
'Wellsiana' is a compact semi-evergreen perennial forming a spreading clump to 10cm in height, with dark green leaves and large, long-stemmed, very fragrant, deep purple flowers
'Velour Purple and White' is a compact pansy to 15cm, with yellow-eyed, light purple flowers with white markings, flowering in spring and summer
'Nellie Britton' is an evergreen, clump-forming perennial to 15cm in height, with ovate leaves and pinkish-mauve flowers 2.5cm in width in summer
'Splendid Blue and Yellow' is a compact small-flowered bedding viola to 20cm, with violet-blue flowers, the lower petals lighter, flushed with yellow and rayed violet
'Victoria' is a vigorous, evergreen climber, to 8m tall, with 3- or 5-lobed leaves, and in summer, deep pinkish-white flowers with dark purple-red coronal filaments tipped with white that may be followed by edible fruit
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