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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.
'Cerise Queen' forms hummocks of silvery-green, evergreen foliage reaching around 30cm in height. Double flowers of strong pink, with yellow centres, and tissue-textured petals are borne from spring through to mid-summer
'Henfield Brilliant' is a vigorous, spreading evergreen shrub to 30cm in height, with dark grey-green leaves and single, bright orange flowers to 3cm in width in late spring and early summer
'Jubilee' is a spreading evergreen shrub to 25cm tall, with narrow, dark green leaves, and nodding, double, primrose-yellow flowers in late spring and summer
H. nummularium is a low, spreading evergreen shrub with tiny, oval leaves and sulphur yellow flowers produced from late spring to early autumn
'Fire Dragon' is a spreading evergreen shrub to 30cm in height, with narrow grey-green leaves. Flowers single, bright orange-red, redder in centre, borne in late spring and early summer
'Wisley Primrose' is a vigorous evergreen shrub with elliptic grey-green leaves and single, primrose-yellow flowers with a darker centre
'Amy Baring' is a low-growing evergreen shrub forming spreading mats to 12cm high, with narrow elliptic leaves. Flowers single, deep yellow with an orange centre, borne in racemes from late spring
'Mrs C.W. Earle' is a spreading evergreen shrub to 25cm tall, with narrow, dark green leaves. Flowers double, scarlet, tinged yellow in the centre
'Georgeham' is a small, evergreen shrub that bears thin-petalled, pink flowers with a central boss of yellow stamens surrounded by a cream ring, in late spring and early summer
Vigorous, spreading evergreen shrub to 30cm tall, with silvery-grey oblong leaves. Flowers single, 3cm wide, pale pink with an orange-yellow centre
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