North Yorkshire
Essex
Devon
Surrey
Greater Manchester
General enquiries 020 3176 5800 Mon – Fri | 9am – 5pm
Help us achieve our goals
Make a donation
We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of suppliers.
AGM plants have been through a rigorous trial and assessment programme. They are:
Easy to grow and fast to flower, annuals and biennials bring quick colour to the garden. They are usually cheap to buy in great numbers, but make a big impact in the garden. Have a go at growing them from seed
Try amaranths for a splash of unusual colour and drama. They're easy to grow and now's the time to get sowing or ordering plants.
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Hide Filters
Refined by:
Sort by:
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.
A. arvensis is an annual plant that is hairy and bristly. Leaves are wavy, have an almost warty appearance and are narrow and pointed; upper leaves clasp the stem. Small blue, flared, tubular flowers are borne in clusters from early summer through to autumn
A. gigas is a robust biennial or short-lived perennial with pinnately divided leaves and erect, branched, purple stems bearing large umbels of deep purple flowers in late summer and early autumn
A. cerefolium is an upright annual with aniseed-flavoured, 2- to 3-pinnate leaves with ovate leaflets, and umbels of small white flowers in summer
A. sylvestris is a common British wild plant, flowering on hedge banks and roadsides in late spring and early summer with frothy white umbels composed of numerous small flowers
A. molle is a vigorous, dwarf sub-shrub with both procumbent and almost upright stems carrying sticky-hairy, green leaves. White to pale-pink flowers with yellow throats, are produced from the upper leaf axils in early to mid summer
A. lappa is an erect, branching plant to 2m, with purplish flowerheads in clusters on the leafy main branches, and dull green leaves. Characteristic brown seedheads
C. formanekiana is a biennial or short-lived perennial producing an evergreen rosette of silvery-grey leaves. After one or two years an upright flower-spike to about 30cm develops, with shorter, horizontal branches at ground level, all bearing large, bell-shaped flowers in very pale lilac-blue or white
C. incurva is a short, softly hairy, biennial plant, that is usually monocarpic (dying after seeding once) though it can be longer-lived. Multiple flower stems, curving outward and upward to 30cm tall, rise out of a basal rosette of stalked, pale green, usually heart-shaped leaves. Flowers are large for the size of plant, 4-5cm long, a curvacous bell-shape like Canterbury bells, pale bluish-lilac, borne in lax panicles throughout the summer
C. thrysoides is an upright biennial or short-lived perennial to around 50cm tall with a rosette of narrow, stiffly hairy, lance-shaped leaves to 12cm long. Unbranched, bristly and leafy stems develop in summer and bear a dense, fat spike of creamy-yellow, slightly fragrant, tubular flowers up to 2.5cm long
The welted thistle is a branched biennial reaching up to 1.5m in height. Leaves are pinnately lobed. Downy stems are spiny and winged until just below the terminal clusters of purple flowers. These are encased in woolly bracts, opening in June and August.
Easy to grow and fast to flower, annuals & biennials bring quick colour to the garden, and they include many of our favourite wildflowers. Have a go at growing them from seed.
View specially-selected annuals & biennials at 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.
