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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.
S. exigua is a suckering shrub forming a thicket of slender stems bearing narrowly lance-shaped to linear leaves to 10cm long, silvery when young, later grey-green
'Wehrhahnii' is a slow-growing, small, spreading deciduous shrub with erect, purple-brown shoots bearing silvery-white male catkins, later yellow, followed by bright green leaves later dark, glaucous beneath
S. lanata is a bushy, slow-growing small deciduous shrub with rounded, silvery-woolly leaves to 6cm in length. Male catkins erect, to 5cm, silvery becoming yellow; female catkins longer, greenish
'Melanostachys' is a bushy shrub to 3m tall, with oval, glossy leaves that are grey-hairy when young; showy black catkins open in early spring and have orange-red anthers that turn yellow as they mature
'Tristis' is a fast-growing weeping willow with narrow leaves on slender yellow branches, and slim female catkins in early spring
S. purpurea is a spreading shrub or small tree to 5m, with arching purplish shoots bearing narrowly oblong, blue-green leaves and slender silvery catkins on bare shoots in early spring
S. caprea is a rounded deciduous shrub or small tree with broadly elliptic leaves greyish beneath, and large grey catkins in spring
S. fargesii is a distinctive, wide-spreading deciduous shrub to 3m in height. Branchlets are stout, glossy green, becoming glossy dark brown in their second year, and winter buds are bright red. Leaves are large, elliptic to elliptic-lanceolate, to 18cm long, 3.5-8cm wide, glossy dark green above with impressed veins; dull green below. Slender, erect catkins to 12cm long (males) or 18cm (females) are produced in spring
'Kilmarnock' is a stiffly pendulous small tree with yellowish branches, ovate leaves, and large grey catkins with yellow anthers opening before the leaves
S. reticulata low-growing, prostrate deciduous shrub forming a wide patch to 12cm high. Leaves 2-4cm, rounded, rich glossy green above, with impressed veins; glaucous beneath. Male catkins erect, 2cm, are borne with the leaves
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