• 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

Horticultural shows

Competitions within RHS Horticultural shows are open to all - check our list of 2015 shows, from ornamental plants to fruit and veg (20kB pdf)

For specialist show schedules and forms, please email the Horticultural Competitions Manager Georgina Barter, tel: 020 7821 3142.

2015 Plant Society events at RHS Garden Wisley


Seedhead of Baptisia australisSeeds on Show
10–11 October

Sale of seed and seed displays by the RHS Seed Team, Alpine Garden Society, Cyclamen Society and Plant Heritage.


Cyclamen hederifolium

Cyclamen Autumn Show
11 October

The Cyclamen Society Autumn Show, offering exhibits of autumn-flowering Cyclamen and companion bulbous plants. Meet the cyclamen experts, too. More about the Cyclamen Society
10am - 4pm Hillside Events Centre


Delphinium 'Centurion Sky Blue'An afternoon with Delphiniums
14 November

The Delphinium Society offer practical advice on their plant group for beginners and experts alike. Featuring photos, displays and talks – and the chance to meet representatives from the Delphinium Society.  Experts will be on hand to answer your questions and give practical advice on cultivating, caring for and displaying these stunning plants.
1.30 - 4pm Hillside Events Centre
Normal garden admission


Advertise here

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

Sign in