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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.
'Scarlet Tempest' produces a basal clump of mid green leaves and large, double, apricot-flushed scarlet red flowers held above on sturdy stems. The first flush of flowers appear in mid spring and then over a long period from summer to autumn
'Cooky' is clump-forming, softly-hairy perennial with lobed, basal leaves to 20cm long. The bright orange flowers, up to 4cm across, are produced from late spring to summer. Height about 45cm
'Leonard's Variety' is a compact, clump-forming perennial to 45cm tall, with lobed basal leaves and reddish-brown stems bearing several nodding, bell-shaped, semi-double, coppery-pink flowers 3-4cm wide in late spring and summer
'Karlskaer' is a clump-forming, herbaceous perennial, to 35cm, with basal rosettes of lobed leaves. The tangerine-orange, semi-double flowers are produced on dark red stems from late spring to mid-summer
'Georgenberg' is a clump-forming, herbaceous perennial, to 25cm, with basal rosettes of lobed leaves. The orange-yellow, single flowers, up to 4cm across, are produced from late spring to mid-summer
'Prinses Juliana' is a clump-forming, herbaceous perennial with lobed basal leaves and vivid orange, semi-double flowers on tall stems produced in early and midsummer
'Blazing Sunset' is a clump-forming, herbaceous perennial, to 60cm, with basal rosettes of lobed leaves. The double red flowers, up to 6cm across, are produced from late spring to late summer
G. coccineum is a clump-forming perennial, to 45cm tall and wide, with leaves up to 20cm long and divided into 5 or 7 toothed or lobed leaflets. Scarlet, saucer-shaped flowers, up to 4cm across, are borne on upright stems in groups of two or four from late spring into summer
'Lady Stratheden' is an herbaceous perennial making a clump to 60cm in height, with hairy, dark green, pinnate basal leaves and purple stems bearing semi-double, rich yellow flowers 4.5cm in width
'Beech House Apricot' is a clump-forming, herbaceous perennial, to 20cm, with basal rosettes of lobed leaves. The semi-double flowers are soft yellow splashed with apricot, carried on dark red stems from late spring to mid-summer
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