• 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

Cardoon - Cynara cardunculus

10 award winning silver-leaved plants

Silver and grey foliage is very adaptable and also has a definite character of its own, says plantsman Graham Rice

Annuals

Perennials

Trees

Shrubs

Bulbs

Herbs

Fruit

Vegetables

Greenhouse

Climbers

Plants for pollinators

Plant awards

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).

Read more

Trialling plants at Wisley