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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.
'Gold Rider' is a vigorous evergreen conifer making a large tree of narrowly conical habit. Foliage bright yellow, holding its colour well through the year
'Naylor's Blue' is a narrowly conical to columnar evergreen tree with irregular sprays of greyish-green to blue scale-like leaves; this glaucous colouring becomes more pronounced in winter
'Castlewellan' is a vigorous columnar evergreen conifer to 25m or more, with flat sprays of golden-yellow foliage, sometimes tinged bronze
'Silver Dust' is a broadly conical or flame-shaped evergreen tree with dark grey-green foliage splashed with creamy-white shoots
x C. notabilis is an evergreen conifer to 15m tall or more, broadly conical in habit, with rather lax sprays of blue-green, scale-leaves and small, globose grey-green cones
x Cuprocyparis leylandii is large, fast-growing, dense conifer of columnar habit which can reach heights in excess of 30m if unchecked. Its dense foliage forms flattened, slightly drooping sprays of scale-like leaves
Listed in the RHS Plant Finder
This plant is listed in the RHS Plant Finder book. At present our information about this plant is limited to a list of the nurseries that supply it. In time we will be adding more details including a description, growing information, advice and photographs.
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