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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.
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Search by plant name, key attributes or both to find plant details and a list of
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.
the RHS today and get 12 months for the price of 9
Other common names
garden rhubarb pie plant
Rheum × cultorum
Rheum are robust rhizomatous herbaceous perennials with large, simple or palmately lobed leaves and tall leafy stems bearing large panicles of tiny flowers
R. × hybridum is an herbaceous perennial which develops from a short crown, producing thick, angular stems and somewhat triangular leaves. The edible stems are 30-40cm in length and change from a light pink to red and finally green as they develop and age
Toxicity Leaves mildly toxic if ingested
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
MoistureMoist but well-drained
SoilSand, Clay, Chalk, Loam
pHAcid, Alkaline, Neutral
Time to ultimate height
Any fertile garden soil can be used for rhubarb as long as it is well-drained and in full sun. Crowns ("sets") can be cropped for ten or more years, though division may be necessary after about five years. Plant crowns in November or December and up to the beginning of March if necessary. A spring mulch of well-rotted organic matter 7cm (2 1/2in) deep will help to retain moisture but do not bury the crowns. Plants will also respond to watering during prolonged dry periods in summer. Apply a general fertiliser in spring or summer . See also rhubarb cultivation
Lift crowns between autumn and early spring (usually in November). Use a spade to divide the crown into sections each retaining a portion of the rhizome (thickened root) and at least one growing point. Sections from the outer part are better than the centres of old plants. Discard any old or decayed parts of the crown. Replant straight away or wrap in damp sacking until ready to plant
Suggested planting locations and garden types
Patio & Container Plants
Pruning Remove any flowerheads that may develop. Allow the foliage to die back naturally in autumn then cut away the old leaves to expose the growing points to winter cold
Pests Aphids, slugs and snails may be problematic
Honey fungus and a virus may be troublesome
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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