There are a number of internationally recognised symbols, trademarks and registered marks that occur from time to time throughout the catalogue. The following is a brief explanation of each one:

RHS Award of Garden Merit This plant/cultivar has been awarded the RHS Award of Garden Merit because it has proved to be
reliable in appropriate conditions and is a good performing plant.
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RHS Plants for Pollinators The RHS Plants for Pollinators mark is only given to plants that support pollinating insects.
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