The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions.
Trials field at the RHS Garden Wisley, showing some of the hundreds of varieties assessed for the Award of Garden Merit
Echeveria 'Perle von Nürnberg', a winner of the Award of Garden merit
Royal Horticultural Society
The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
RHS headquarters, Vincent Square
London flower show in Lawrence Hall
Royal Horticultural Society Libraries at the Senate House History Day, 2019.