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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.
P. radiata is a vigorous evergreen conifer making a large tree to 30m or more, developing a broad rounded crown with maturity. Dense dark green needles in threes, and persistent, conical-ovoid cones to 15cm in length
P. ponderosa is an evergreen conifer making a large tree with handsome, scaly brown bark. Needles dark green, to 25cm in length, mostly clustered at branch ends. Cones about 15cm in length
P. muricata is a medium-sized evergreen tree developing a narrow, flat-topped crown, with stiff, green to dark grey-green needles to 12cm in length, in pairs. Prickly ovoid cones persist on the tree for many years
P. contorta var. contorta is a spreading conifer to around 15m tall and 7.5m wide forming an upright tree with a flat or irregularly rounded crown in sheltered spots but assuming a more shrub-like form with bent or twisted branches when grown in coastal areas and exposed to high winds and salt spray. The needle-like leaves 3-6cm long are arranged in pairs and may be twisted; yellow-brown cones 3-7cm long are borne in pairs or clusters and their scales have a slender recurved spine
'Aurea' is a slow-growing evergreen tree with blue-green needles that turn yellow from late autumn to spring
'Aurea' is an attractive conical shape when young, eventually forming a large, broad-topped tree. The needles are 10-15cm long, borne in threes and golden yellow. Brown cones are produced in clusters on mature trees and remain in place for years
'Adcock's Dwarf' is a dense, slow-growing evergreen conifer making a small, rounded shrub, with short, blue-green needles in fives, clustered at the branch-tips
Aurea Group are large conifers, to 30m tall, with a conical habit when young becoming more dome-shaped as the tree matures. Golden-yellow needles, each up to 15cm long, are arranged in groups of three and densely-packed along the branchlets. The short-stalked, brown cones, up to 15cm long, are borne in whorls of two or three along the branches, often remaining closed for many years
P. pinea is an evergreen conifer making a round-topped evergreen tree with stiff, dark green needles to 15cm long. Cones rounded-ovoid, to 15cm long, shiny light brown. It will reach 15-20m when fully mature
'Winter Sun' is a dwarf pine tree, with pairs of deep green needles, turning lime-yellow in winter, and forming a mound of less than 60cm in 10 years
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