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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.
Star Wars is a compact, bushy herbaceous perennial to 30cm in height with bronze-flushed, divided oval leaflets from summer to autumn. Colourful, pinkish-orange star-shaped flowers with yellow centres are borne from summer to autumn
'Sugar Plum' is a compact deciduous shrub with arching branches of lance-shaped leaves, whitish beneath, and long panicles of rich purple-red, scented flowers
M. flaccida is a cormous perennial, to 60cm tall, producing a single, arching leaf that may reach as much as 1m long. Six-petalled, salmon or yellow flowers are produced on branched stems in spring and summer
'Oeschberg' is a striking cultivar, many-branched but upright, with dark foliage and crimson flower spikes
Plants grown as A. africanus are evergreen perennials with strap-shaped leaves and erect stems to 0.8m, bearing umbels of deep blue, trumpet-shaped flowers in summer
'Lemon Fizz' is a trailing, tuberous perennial, to 30cm high, with fully double, fragrant blooms of orange-yellow edged with pink. The leaves are dark green above, pale green below, with purple flushing. Flowers mid-summer into autumn
'Thai Sita' has a neat, upright habit, growing to about 30cm. The leaves are narrow and dark green and the stems deep purple. The flowers are purple and white, with dark purple bracts
'Clearview Louise' grows to around 1.5m tall. It blooms in summer and early autumn, with large flowerheads to 20cm across bearing petals blended in pale yellow and pink or bronze
'Rosea' is a small, vase-shaped, deciduous tree. The very small, small, single flowers are shell pink, opening in mid-spring from red buds
I. lobata is a twining climber up to 5m tall, usually grown as an annual, with three-lobed leaves. The crimson-flushed stems bear one-sided racemes of small, tubular, dark red flowers which fade to orange and then a creamy yellow in summer
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