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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.
H. sieboldii is a small, compact, clump-forming perennial. Leaves are narrow, lanceolate, to 15cm in length with mid-green centres and narrowly-edged with white. Funnel-shaped, lavender-coloured flowers, on stems to 60cm, appear in mid to late summer
H. fortunei var. albopicta f. aurea makes a compact clump of broad, heart-shaped leaves 20-25cm in length, creamy-yellow, fading to dull green, with impressed veins. Funnel-shaped mauve flowers are borne on leafy stems to 75cm in length
'Zounds' makes a compact mound of puckered, broadly ovate, golden yellow leaves to 25cm long, with very pale purple flowers in mid summer
H. venusta is a compact herbaceous perennial with glossy dark green, narrowly ovate leaves to 5cm in length. Trumpet-shaped violet flowers are borne in short racemes on stems to 30cm in height in late summer and early autumn
H. crispula is a clump-forming herbaceous perennial with narrowly-ovate, wavy, dark green leaves broadly margined with creamy-white. Funnel-shaped, pale lavender flowers are borne on erect leafy stems to 75cm
'Moonlight' is a clump-forming perennial, 50cm high by 70cm across, with olive-green leaves fading to yellow-green, with a narrow, white margin. The funnel-shaped, lavender-blue flowers appear in mid-summer
'Blue Cadet' is a clump-forming perennial with blue-grey ovate leaves, slightly dimpled when mature and with distinctive, pointed leaf-tips. Funnel-shaped, lavender-pink flowers are held on erect stems, 55cm high, in mid to late summer
H. yingeri forms a small clump of mid to dark green leaves; purple flowers are borne on upright stems from late summer to early autumn
'Frosted Mouse Ears' is a dainty, clump-forming, miniature cultivar, with small, rounded blue-green leaves that have broad creamy-white margins. Violet-purple, bell-shaped flowers are borne on upright stems, around 20cm high, in summer
'Praying Hands' is a herbaceous perennial forming a clump about 40cm tall and wide. The leaves are dark green, very shiny underneath, with a narrow creamy-yellow margin. They are heavily rippled, and folded along their length, giving a very upright effect. The pale lavender, bell-shaped flowers appear in summer
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