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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.
When using this search
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
rocambole serpent garlic
Allium contortum Allium controversum
Allium ophioscorodon Allium sativum var. subrotundum
Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem
A. sativum var. ophioscorodon is an edible, bulbous perennial, to 60cm high, with linear grey-green leaves. In summer, umbels of pinkish-white flowers are borne on flower stalks that are initially coiled like a snake before straightening out. If being grown as an annual for culinary use, each bulb will yield between four and ten cloves or bulbils
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or North-facing or West-facing or East-facing
MoistureWell-drained, Moist but well-drained
SoilSand, Clay, Chalk
pHAcid, Alkaline, Neutral
Time to ultimate height
Grows best in a fertile, well-drained soil in full sun
Propagate by seed or by division
Suggested planting locations and garden types
Flower borders and beds
Cottage & Informal Garden Gravel Garden
Pruning None required
Pests Slugs and snails may attack new growth
Onion white rot and downy mildews may occur
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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.