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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.
'Rubin' is a clump-forming perennial with narrowly ovate leaves and erect stems bearing slender racemes of small pale pink flowers with purplish lower lips, in summer and early autumn
'Dear Anja' is a clump-forming perennial, to 90cm high, with lance-shaped, aromatic leaves with scalloped edges and erect purple-stemmed spikes of densely-packed dark blue flowers whose lower lips are edged white
S. × superba is an erect, clump-forming perennial to 90cm in height, with oblong leaves with crenate margins. Flowers 12mm in length, 2-lipped, violet to purple, in long, dense branched racemes
'Mainacht' is a compact perennial with neat, dark green foliage and dense racemes of deep violet flowers in early summer
Listed in the RHS Plant Finder
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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Britain’s best gardening annual, available now from RHS Mail Order and all good bookshops.
Last-listed in the RHS Plant Finder in 2016
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