• 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

Plants

Helleborus [HGC Cinnamon Snow] = 'Coseh 700'

Discover new trends in hellebores

There's a lot happening in the world of hellebores at the moment; from new colour breaks to extended flowering seasons and novel forms to delight gardeners

Annuals

Perennials

Trees

Shrubs

Bulbs

Herbs

Fruit

Vegetables

Greenhouse

Climbers

Plants for pollinators

Plant awards

Karen Robbirt (RHS Staff) avatar

Amazing amaryllis on display in the Glasshouse

by Karen Robbirt

If you are heading over to see the Butterflies in the Glasshouse this month, ...

Read more about Amazing amaryllis on display in the Glasshouse

RHS Plant Trials and awards

Every year we trial dozens of plants to find out how they will perform in your garden. The very best are awarded the RHS Award of Garden Merit (AGM).

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Trialling plants at Wisley