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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.
'Pygmy Torch' is a compact annual with lance-shaped green leaves and erect, deep maroon inflorescences, good for drying
'Escarboucle' is an aquatic perennial with round, floating leaves 20-25cm in width, and fragrant, cupped orange-red flowers to 20cm across, with orange stamens
'Fan Zinnoberrosa' is an upright bushy perennial to 60cm tall, usually grown as an annual, with narrow, dark green leaves and deep rose-red flowers 3cm wide, in dense spikes from mid summer to early autumn
'Alexander Hunter' is a large, upright shrub of compact growth, with single or slightly doubled, deep crimson flowers 10cm in width
'Scarlet Wonder' is a compact small shrub forming a spreading mound with dark, ribbed leaves and small, lax trusses of bright deep red flowers with rather frilled corolla lobes
'Ann Hoystead' is an erect plant to 40cm in height, with large clusters of single deep red flowers, the upper petals with blackish markings
Wild Rover is a floribunda rose that may be grown as a shrub, reaching about 1.2m in height, or as a small climber reaching 1.8m. It has an upright, bushy habit and bears clusters of semi-double, scented flowers in a reddish-purple, with a central golden boss, through the summer until autumn
C. gilliesii is a large evergreen shrub or small tree, with 2-pinnate leaves composed of tiny oblong leaflets, and showy yellow flowers 3cm across, with long crimson stamens
Floral Showers Series are very compact, dwarf snapdragons, to 20cm, early flowering with big flower spikes. 'Floral Showers Bronze' has rust-red flowers with a yellow throat and a slight fragrance
'Jomanda' grows to about 1m, with small, rounded light orange-red flowerheads in late summer and autumn
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