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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.
'Coronation Ruby' is a hardy perennial with evergreen, glaucous foliage and stems to 45cm, bearing clove-scented, double flowers 5cm in width, with pale pink petals, zoned and laced with deep maroon
'Anders Kath Phillips' is an evergreen perennial with grey-green leaves and pale, creamy-yellow flowers with each petals finely edged with deep purple
'Spinfield Happiness' is a vigorous perennial with unscented, double, pale orange-yellow flowers 6cm across, the petals becoming streaked with deep rose towards the margins
'Sweetness' is a dwarf, evergreen perennial with narrow, grey-green leaves, creating a spreading mat with multi-flowered stems to 15cm in height. The highly-scented, bicolour flowers, to 5cm wide, are saucer-shaped with fringed petals, 5cm wide, in a range of colours from white, through pale-pink to dark-magenta pink. Flower centres are of a contrasting, darker shade of pink to the main petal
'Carmine Letitia Wyatt' grows to 30cm tall, with grey-green foliage and slightly fragrant, deep salmon-pink, double flowers in early summer
'David Saunders' is a spreading evergreen perennial to 50cm in height, with grey-green foliage and clove-scented white flowers edged and marked with ruby-red
'Cranmere Pool' is a compact evergreen perennial with glaucous foliage and stems to 35cm, bearing 6cm in width, double flowers with white petals, zoned deep red at base; slight scent
'Marion Robinson' is a spreading perennial with slightly fringed, double flowers 6cm across, the petals pale creamy-yellow, flecked and striped with blood-red
'Zoe's Choice' is a compact evergreen perennial with greyish foliage and stems to 30cm in length, bearing strongly clove-scented, double flowers with broad white petals, speckled and streaked with deep rose-pink
'Eileen O'Connor' is an evergreen perennial to 30cm in height, with greyish foliage and flowers to 6cm across, with a weak clove scent, the slightly fringed petals salmon-orange tinged with coral-pink
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