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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.
'Wisley Vanilla' is a tender perennial often grown as a bedding plant. The flowers are white with a very pale pink flush, particularly on the upper petals, and a yellow eye; strongly vanilla-scented
N. denticulata is a vigorous mat-forming perennial to 20cm in height, with ovate, toothed leaves and racemes of light purple flowers in summer and early autumn
Melanie is a compact perennial to 15cm in height, with small dark green leaves and racemes of pale yellow-eyed, mauve-pink flowers from late spring to summer
'Sea Mist' is a compact mat-forming perennial usually grown as an annual, with narrow leaves and loose racemes of fragrant, pale purple flowers from late spring to early autumn
Pink Lagoon is a half-hardy perennial that produces compact mounds covered with pale pink flowers each shaped like a rounded viola. Plants are sterile
N. caerulea is a tender, compact, mat-forming perennial, often grown as an annual, that reaches a height of around 50cm. The erect to spreading stems bear lance-shaped leaves, up to 3.5cm long, and two-lipped, tubular flowers in shades of blue, pink and white, with yellow throats, from spring into autumn
Framboise is a tender perennial that's often grown as a bedding plant. It has a compact, upright, bushy growing habit and raspberry to lilac-pink flowers
Raspberries and Cream is a tender perennial that's often grown as a bedding plant. The flowers have reddish-purple upper petals, white lower petals, yellow eyes and are lightly-scented
Blue Cloud is a perennial usually grown as a half-hardy annual, making a mound to 15cm in height, with small, glossy leaves and dense racemes of yellow-eyed, violet flowers from late spring to late summer
Myrtille is a tender perennial that's often grown as a bedding plant. It has a compact growing habit and purple-blue flowers
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