• 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)

RHS Gardener

Plant of the month: New England aster

by RHS Gardener

Asters are a great group of perennials to use in the garden for late-season inte

Read more

RHS Plant Trials

Trial plants are submitted by nurseries, individuals and breeders.

Advertise here

Grower guides

Once an RHS Plant Trial has finished, we share the findings to help you choose the best plants for your garden.

New AGM lists

See the most recent AGM lists of plants.

AGM lists