Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
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. buchananii is a tufted perennial to 75cm, with narrow, evergreen, orange-brown, arching leaves with curling tips, and brown flowering spikes in late summer
R. maxima is a tall herbaceous perennial producing a mound of large, smooth, blue-grey leaves. The flowering stems rise to 1.5m, carrying yellow-petalled daisy flowers with central dark brown to black cones from midsummer to mid-autumn
'Innocent Heart' is a compact perennial to 40cm, with pale green foliage and stems bearing up to 3 flowers, the standards light yellow, the falls light yellow flushed with brown
'Brown Lasso' is an erect herbaceous perennial to 50cm, with sword-shaped foliage and flowers with deep brownish-yellow standards; falls pale violet, edged with brown and with a yellow beard
'Gipsy Queen' is a medium-sized, vigorous deciduous climber with pinnate leaves. Single velvety violet-purple flowers with 4 to 6 broad sepals are 12-14cm wide with reddish-brown stamens. Flowers midsummer to early autumn.
H. trionum is an upright annual, to 60cm tall, with oval, serrated leaves. The creamy-white or pale yellow flowers, with purplish-brown centres, are borne from late summer to early autumn and followed by bladder-like seed capsules
'Loose Valley' is a clump-forming perennial with arching, glaucous leaves, that reaches up to 60cm in height. Up to 7 flowers are borne on each stem from early to mid-summer ; occasional re-flowering may occur as late as November. Flowers are light yellow with purple-brown markings, particularly around the edges of the falls
C. angustifolius is a perennial corm with narrow leaves and scented, bright deep yellow flowers, strongly feathered with dark mahogany on the outside
'Short Order' is an evergreen perennial forming a neat clump to 40cm in height, with narrow, dark green leaves and pale yellowish-cream flowers 6cm in width, with light yellow falls speckled and veined with brown
B. lenta is a conical tree, to 15m tall, with dark-red bark that becomes dark-grey with age. Aromatic shoots produce yellow-green leaves, to 10cm long, that turn yellow in autumn. Yellow-brown male catkins, to 8cm long, appear in early spring
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.
Join the RHS today and get 12 months for the price of 9