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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.
'Gazebo White' is a bushy, relatively compact half-hardy annual, to around 70cm tall, with finely-divided, green leaves. Large, white flowers, are borne throughout the summer and into early autumn, on erect, well-branched stems
C. sulphureus is a half-hardy annual with fresh, fern-like foliage and a long flowering season. Selections are variable in height, most between 50cm and 1m, but including some dwarf forms. Flower colour is varied, in many tones of yellow, orange and red
Sensation Series Mixed are half-hardy annuals with fine, feathery foliage and, from summer into early autumn, single flowers, to 9cm in diameter, in shades of pink, red and white that are borne on stems to 1.2m tall
'Rosetta' is a half-hardy annual, to 90cm tall, with finely-divided foliage. Semi-double flowerheads, borne from summer into autumn, have striped petals in shades of pink and white with an inner ring, or collarette, of smaller petals surrounding the yellow centre
'Lemonade' is a compact, half-hardy annual to 60cm tall with finely-divided foliage. Flowers are borne on sturdy, branching stems from summer into autumn and have pale yellow petals, each of which is marked white at the base, forming a ring around the yellow eye
'Cupcakes White' is an upright, half-hardy annual, to 1.2m tall, with finely-divided foliage. The pure white petals of each flower are fused together to form a bowl shape around the yellow centre; flowers are borne from summer until the first autumn frosts
'Apollo Pink' is a half-hardy annual, to 65cm in height, with finely-divided green leaves and, from summer into autumn, pink daisy-like flowers, to 10cm in diameter, with prominent yellow centres
Sonata Series are compact annuals to 30cm, with finely dissected leaves and single, daisy-like flower-heads 8cm across, in shades of red, pink and white with yellow centre
'Rubenza' is a half-hardy annual to 75cm in height with divided, ferny foliage and large deep red, velvety flowers. These fade with age to a warm pink, giving a two tone effect
Cupcakes Mixed are erect, bushy annuals up to 90cm high, with very finely-divided green leaves and flowers from about midsummer to the first frost. The distinctive flowers, 10-12 cm across, have the outer rays fused together around the yellow centre to form a bowl; the flowers may be single or semi-double, and the outer rays may be white, pale pink, or pink with darker pink at the base
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We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.