Join the RHS today and support our charitable work
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Free entry to RHS members at selected times »
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Help us achieve our goals
Join the RHS today and support our charity
I have forgotten my password
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
See what events are on near you and browse your bookmarked pages.
Begin a new search
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.
C. indivisa is a slow-growing, evergreen erect tree reaching heights of 3m or more. The lance-shaped, blue-green leaves are relatively broad at 10-30cm wide and from 0.6-2m long with an orange-brown midrib. Small, white, star-shaped flowers borne in dense clusters in summer are followed by tiny purple-blue fruits
N. obvallaris is a bulbous perennial to 30cm tall, with glaucous, strap-shaped leaves and solitary bright yellow flowers with flared trumpets and slightly paler perianth segments, opening in early spring
'Night Star' is a compact plant to 30cm tall, with grey foliage and single flowers 3cm across. Petals broad, with toothed edges, deep red-purple with rich pink margin and blotches
'Master Michael' is a rounded, evergreen shrub with wavy-edged leaves that are grey-green above and felted, pale green below. The daisy-like flowers are purple with yellow centres and appear in profuse clusters in late spring
'Crimson King' is a vigorous medium-sized deciduous tree. Leaves large, 5-lobed, deep purplish-crimson all summer. Flowers reddish-orange, in clusters on leafless branches
'Kestrel' is a strong-growing upright perennial to 2m tall, with large, dark green leaves and semi-double, rich blue flowers to 6.5cm across, in spikes to 90cm long, with many side branches, flowering in early summer
'Daydawn' is a spreading, bushy deciduous shrub to 80cm tall, with small, pinnate leaves and saucer-shaped pale yellow flowers tinged yellow and pink, from early summer to early autumn
'Whirling Butterflies' is an upright herbaceous perennial to about 80cm, producing airy spires of delicate white flowers with long white stamens, opening from pink buds over a long period from late spring to early autumn
'Devon Maid' is a bushy evergreen perennial with grey foliage and stems to 35cm, bearing clove-scented, semi-double white flowers 5cm in width, with fringed petals and a deep crimson eye
P. alopecuroides is grass forming a dense clump of narrow leaves to 60cm long, turning pale brown in winter, with tall stems bearing softly hairy, oblong, green to purple inflorescences in late summer and early autumn
Choose from hundreds of plants, bulbs, seeds and gardening products from our online shop.
Save now on all plants
& bulbs from the RHS Plants Shop
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.