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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:
'Pretty Lady Susan' is an herbaceous perennial with dark, divided leaves and vivid pink semi-double flowers and contrasting yellow stamens
'Honorine Jobert' is an herbaceous perennial with dark, divided leaves and pure white flowers with 6-9 tepals and contrasting yellow stamens
'Lady Gilmour' is a tall perennial with leaves of three leaflets that have crisped margins when young; bowl-shaped pink flowers 6cm across have about 12 narrow, somewhat twisted petals
'Königin Charlotte' is a perennial with attractive, divided leaves and large rich rose-pink, semi-double flowers with 10-15 overlapping petals
'Hadspen Abundance' is a perennial with leaves composed of three ovate leaflets. Flowers 5-7cm in width, rich, deep, purplish-pink, with five rounded tepals
'Robustissima' is a tall plant with divided leaves and 5-petalled pink flowers 5cm wide, borne on reddish stems from late summer to autumn
'Elegans' is a tall, erect perennial with ternate foliage and, from late summer to autumn, bowl-shaped, light pink flowers to 7cm across, with broad outer petals, and narrow inner ones
A. x hybrida is a vigorous, erect, woody-based perennial with suckering shoots and mid-green leaves with three oval leaflets. Branched stems bear sprays of semi-double, pale pink flowers to 9cm across from late summer to mid-autumn
'Whirlwind' is a tall suckering perennial with large leaves of three leaflets, and semi-double white flowers 6cm wide, with narrow, slightly rolled petals
'Andrea Atkinson' is an herbaceous perennial to 1m tall, with lobed basal leaves and white flowers 6cm wide, tinged with pink and green on the outside, and opening in late summer and autumn
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