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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.
'Violetta' is a herbaceous perennial with a rosette of large, broadly spoon-shaped leaves, and highly branched sprays of tiny flowers with silvery calyx-tubes and violet petals
'Forever Gold' is an erect annual to 60cm in height, with sinuately lobed basal leaves and branched stems bearing dense short spikes of bright yellow flowers in summer and early autumn
L. bellidifolium is a compact, evergreen, woody-based perennial to 15cm with rosettes of spoon-shaped, dark green leaves. Open sprays of tiny, pale purple flowers with white, papery calyces are produced on wiry, branched stems in early summer
P. suworowii is an annual producing a basal rosette of light green leaves up to 15cm long. Tiny, rose-pink flowers are borne in narrow, cylindrical, branched spikes from summer to early autumn. Good for cut flowers, fresh or dried
L. platyphyllum is a rosette-forming perennial with a rosette of large, broadly spoon-shaped leaves, and sprays of tiny flowers with white calyx-tubes and pale violet petals
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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.