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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.
M. boaria is an evergreen tree potentially to 20m, but in Britain usually a small tree or large shrub, 3-10m, tall with an oval crown and slender, drooping branches. Leaves are narrowly lance-shaped, 5cm long, shining mid-green above and paler beneath. Flowers greenish-white, small and inconspicuous, numerous, borne in leaf axils in spring and fragrant. May be followed by small, red, 2-seeded fleshy fruits
'Primrose Upward' is a clump-forming plant with long, upright to arching leaves; height to 115cm, spread to 110cm. The flower spikes have distinctive colouring, green buds opening to pale yellow florets just tinged with chestnut. Floriferous, and in flower for a long period
'Esperanto' is a perennial bulb with light green, lance-shaped leaves bordered with a neat, creamy-white edge. The flowers reach 25cm tall, in late spring, and are red with a green flame on each petal edged with pale pink
'Pendula' is a large deciduous tree forming either a broad crown with wide-spreading main boughs draped with long, pendulous side-branches, or more upright with steeply drooping branches. Leaves elliptic, green
'Pseudoturneri' is a spreading, dome-shaped, semi-evergreen tree with an ultimate height and spread of 20m. Leaves are dark green, about 10cm long and have a few shallow, rounded teeth. The flowers are inconspicuous yellow and green catkins, followed by clusters of narrow, 2cm long acorns
V. vinifera is a woody plant, climbing by tendrils, to 15-18m. Leaves are 3- or 5-lobed, coarsely toothed, 7.5-15cm long and wide, with stalks half as long as the blade. Flowers are tiny, greenish, in loose panicles, fruit oval or globose grapes. This species has many named cultivars, selected for fruiting, or for ornamental qualities as the leaves are variable in size, shape and colour
'Blaufuchs' is a deciduous ornamental grass forming a compact tuft to 20cm, of brilliant steel-blue, needle-like foliage, with insignificant narrow panicles of flowers on stems to 35cm
'Blackbird' is a dwarf evergreen sub-shrub forming a bushy mound to 50cm. The narrow leaves are green flushed with dark reddish purple, the colour deepest in good light. The flower bracts are bright yellowish green, present from early to late spring
'Hungarian Crown' is a vigorous large deciduous tree with a massive, rounded crown and boldly lobed leaves to 20cm in length, colouring well in autumn. Flowers inconspicuous, greenish
E. ceratocarpa is a tall, upright, evergreen, sub-shrub to about 170cm in height and spread with slightly bluish foliage. The main flowering period is mid-summer to mid-autumn, but it can produce its yellow-green flowers more or less year round in mild conditions
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