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With so many plants available to gardeners it is useful to know about the best ones to grow. The RHS carries out extensive trials on a wide range of plants and the best are awarded the prestigious RHS Award of Garden Merit (AGM).
The Royal Horticultural Society's Award of Garden Merit (AGM) helps gardeners make informed choices about plants. This award indicates that the plant is recommended by the RHS. Awards are usually given after a period of trial at an RHS garden. Plants are judged by one of the RHS plant committees.
Royal Horticultural Society
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