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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.
'Safranvogel' is a reasonably small cultivar with low, arching foliage; height to 80cm, spread to 90cm. The elliptic to diamond-shaped flower heads are held well above the leaves, and have a delicate colouring of soft peach-pink, getting paler from bud to flower as they open
'Bees' Sunset' is a clump-forming herbaceous perennial to 90cm, with narrow, rough-edged leaves and erect, brownish stems bearing terminal spikes of clear yellow-orange, tubular flowers
'Drummore Apricot' is a clump-forming perennial, to 75cm tall, with arching, strap-shaped leaves and spikes of apricot flowers, opening from green buds and maturing to yellow, from late summer to autumn
'Brimstone' is a clump-forming herbaceous perennial to 90cm, with long, slender leaves and narrow spikes of bright sulphur-yellow flowers opening from green buds
'Shining Sceptre' is a vigorous deciduous perennial to 1.2m tall, with narrow, blue-green leaves and dense spikes of orange buds opening to light yellow flowers, from early summer to early autumn
'Samuel's Sensation' is a robust herbaceous perennial to 1.5m in height, forming a large clump of long, narrow leaves. In late summer and early autumn strong purplish stems bear spikes of scarlet flowers which become tinged with yellow as they age
'Timothy' is a clump-forming perennial with narrow leaves and bronze stems bearing dense spikes of salmon-orange flowers from early summer to early autumn
'Ice Queen' is a clump-forming perennial to 1.5m tall with narrow, arching, green foliage. Flower spikes, produced from mid to late summer, graduate from the merest hint of an orange tip through pale-green, yellow-cream and creamy-white as the individual flowers mature into autumn
K. ensifolia is a robust, evergreen perennial forming clumps of arching, narrow, blue-green leaves up to 1.5m long. The flowers open, base to top, pale yellow from reddish-orange buds in late summer to mid-autumn
K. northiae is an evergreen perennial producing a rosette of broad, smooth, strap-shaped leaves. The flowers have densely-packed florets opening a reddish-orange, fading through yellow to greenish-cream
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