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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
While we update our systems with the new hardiness ratings you may still see old
hardiness ratings in your search results. These are denoted as 'Old'.
For full details of the hardiness ratings see
AGM plants have been through a rigorous trial and assessment programme. They are:
'September Charm' is an herbaceous perennial to 75cm, with leaves composed of three oval leaflets, and slightly cupped flowers 6-8cm wide, with 6-9 light rose-pink petals, deeper pink beneath, opening in late summer and autumn
'Bowles' Pink' is an erect, suckering perennial with leaves composed of three leaflets, and bowl-shaped reddish-purple flowers in late summer and autumn, the two outer tepals smaller and darker
'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
'Praecox' is a deciduous perennial spreading by suckers, with erect stems bearing 3-parted leaves and bowl-shaped deep pink flowers 5-6cm across in late summer and autumn
'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
'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
'K�nigin Charlotte' is a perennial with attractive, divided leaves and large rich rose-pink, semi-double flowers with 10-15 overlapping petals
'Prinz Heinrich' is an herbaceous perennial with attractively divided leaves and semi-double flowers with 10-15 narrow, overlapping, deep rose-pink tepals
'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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