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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.
amethyst halo is a compact, bushy, semi-trailing annual bearing a profusion of purple flowers edged with white from early summer into autumn
phantom is a compact, mounding annual to around 30cm tall with fresh green foliage and flowers with a black base and yellow star pattern borne from summer into early autumn
'Charlie's Angels Charlie' is a vigorous trailing plant to 20cm tall, with deep purple flowers 6cm across from early summer to late autumn
Surfinia Purple is a vigorous trailing plant to 30cm tall, with dark magenta-purple flowers 8cm across from mid summer to late autumn
Cascadias Yellow Eye is a free-flowering, shortly trailing annual to 40cm tall, with fragrant white flowers 6cm wide, with greenish-yellow mid-vein to each lobe
Conchita Blueberry Frost is a free-flowering, compact trailing annual to 25cm tall, with white flowers 5cm across, heavily veined with violet, from early summer to late autumn
'Storm Salmon' is a bushy annual with single, deep salmon-pink flowers to 6.5cm across, with a white throat
'Storm Lavender' is a bushy annual to 30cm, with trumpet-shaped, single, lavender-purple flowers to 7cm diameter, the throat yellow
Black Velvet is a bushy, upright annual producing very dark purple-black flowers up to 5cm across from early summer until the frosts
tumbelina Priscilla is an annual with stems trailing to 90cm long. Fragrant, double, lilac-purple flowers with heavy veining are borne from summer into autumn
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We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.