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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.
'Variegatus' is a medium-sized deciduous shrub with ovate leaves broadly margined cream. Flowers 2.5cm in width, creamy-white, very strongly scented, opening in early summer
V. rhytidophyllum is a large evergreen shrub with glossy, conspicuously veined, oblong dark green leaves, domed clusters of small cream flowers in late spring, followed by ovoid red fruit ripening to black
'Picasso' is a tuberous perennial, to 60cm tall, with arrow-shaped, wavy green leaves spotted white. Each flower stem has a yellow spadix surrounded by a purple-throated spathe with creamy-white rims
'Aureus' is an upright, medium-sized deciduous shrub with ovate leaves bright yellow when young, later greener. Flowers 2.5cm in width, creamy-white, with a strong, heavy scent, in early summer
'Ring o' Roses' is an evergreen perennial forming a compact clump to 50cm in height, with narrow, dark green leaves. Flowers 8cm in width, flushed and veined light violet on a cream ground, the falls with few deep purple veins
T. cacticola is an evergreen, epiphytic perennial, to 30cm tall. with a rosette of silvery-white linear leaves, up to 40cm long, tapering to a fine point. Spikes, up to 30cm tall, bear lilac-lavender bracts from which cream-coloured flowers are produced over a long period
A. hirsutus is an herbaceous perennial, to 45cm tall, with a rosette of toothed and prickly, lance-shaped, dark green leaves, each up to 40cm long and 8cm wide. In summer, short spikes bear creamy-pale-yellow flowers hooded with green bracts. The leaves, stems and flower spikes are covered with silky hairs
'Blackberry and Apple Pie' is a clump-forming, herbaceous perennial which grows to 30cm tall. The rounded, lobed leaves have a green upper surface and a red underside. Dense clusters of white flowers are borne on short, red stems from late summer into autumn
'Bicolor' is a vigorous, clump-forming perennial to 90cm tall with narrow green leaves. Spikes of cream flowers open from terracotta-coloured buds from summer into autumn
'Harlow Carr' is an annual climber with greyish-green foliage and long-stalked racemes of fragrant, cream flowers, flushed with light pink
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