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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.
Crown Princess Margareta has arching stems that can be left to produce a 1.5m high shrub, or trained as a 3.5m high climbing rose. The flowers, produced in summer and autumn, are fragrant, fully-petalled rosettes in apricot-orange
E. californica is a vigorous bushy, spreading annual to 30cm, with finely divided blue-green leaves and orange, yellow or red flowers to 7cm across in summer
'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
'Galaxy' is a spray chrysanthemum to 1.5m, the single flowers with deep orange rays, tinged bronze, and greenish-yellow disks
'Aurora' is a deciduous, aquatic perennial, spreading to 1.5m across, with purple-mottled green leaves. The 5cm wide, orange-centred, star-shaped flowers open yellow and deepen in colour from orange to red with age
'Spinfield Happiness' is a vigorous perennial with unscented, double, pale orange-yellow flowers 6cm across, the petals becoming streaked with deep rose towards the margins
'Aurea' is a spreading medium-sized deciduous tree with large ovate golden-yellow leaves becoming light yellow-green in summer. Flowers white, marked orange and purple, in conical panicles
E. mammosa is an upright, evergreen shrub with whorls of short, narrow, dark green leaves and elongated clusters of tubular flowers in summer and autumn. Flowers may be dark red, orange-red, pink, green or white
'Earthwalker' is strong, vigorous annual, up to 3m high, with coarse green leaves and abundant, multi-headed flowers, in late summer, with dark brown centres and ray florets which may be rich yellow, terracotta orange, dark red or warm brown
'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
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