• AGM plants

    AGM plants have been through a rigorous 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


The naming of names

Plants are at the heart of the RHS. We are the International Cultivar Registration Authority for nine plant groups, including dahlias.

Plant collections

Come and see our 11 National Plant Collections, which are part of a scheme to preserve cultivated garden plants.

Read more

The Plant Review

Published four times a year, The Plant Review (formerly The Plantsman), takes an in-depth look at the bizarre, brilliant and beautiful plants.

Plant committees

Our specialist plant committees are sources of expertise, for instance in the judging process at RHS Shows and in the rolling review of RHS Award of Garden Merit (AGM) plants.

Horticultural database

Search for plants, suppliers and a wealth of other helpful & informative data.

Search the database

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.