• AGM plants

    AGM plants have been through a rigourous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Trial plants are normally grown from plants (as opposed to seed, unless indicated in the list) submitted by nurseries, individuals and breeders. Visitors to RHS Garden Wisley are welcome to view them except for those grown in restricted areas.

See the RHS Trials 2014 programme which includes a range of ornamentals, carnivorous plants and edible crops.

Search the trials database for details on crops and ornamentals

Plant Trials Bulletins

You can see detailed accounts of a range of garden ornamental, fruit, and vegetable trials.

See a comprehensive list of Plant Trials Bulletins


RHS Horticultural Database

Trials also provide an important spur for RHS research into cultivated plants and their names. Use this database to search a large index of garden plant names.

View the RHS Horticultural Database


RHS Herbarium

Trials are an important source of material for the RHS Herbarium located at Wisley, which comprises many separate collections. The primary focus of the collections is to maintain and to acquire reference material of plants in cultivation.

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