• 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

Plant trials & awards

A helping hand for gardeners

See how we run our plant trials and the RHS Award of Garden Merit (AGM)

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Come and see something new today!

by Eva Erhart

It's showtime for the Wisley plant talent contest - visit and vote for your ...

Read more about Come and see something new today!

RHS Plant Trials

Trial plants are submitted by nurseries, individuals and breeders.

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Join in

We're trialling bacopa (Chaenostoma) and bird's foot trefoil at RHS Garden Wisley to see if they're pollinator friendly: download the app and take part today.

New AGM lists

See the most recent AGM lists of plants.

AGM lists