• 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


Download registration forms here:

Application form to register a Rhododendron cultivar name


The RHS publishes The Rhododendron Register and Checklist 2004 and subsequent supplements, some of which are available from the link below.

Rhododendron registers

Advertise here

RHS Membership

Sign in

Exclusive for RHS members: listen to our regular podcasts with gardening advice from the experts

Sign into the RHS website to read more

Sign in