The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control.
Indeed, in rural areas it is possible that gardens could harbour very rare species of lichen. Their appearance signifies a mature garden, blends in harsh stonework to the environment, and adds to the biodiversity of the garden. Where growths of algae, moss, lichens and liverworts present no hazard, such as on stone sculptures and features, gardeners are encouraged to allow them to flourish. Malvern Autumn Show - 22–24 September 2023.RHS Garden Wisley Flower Show - 5–10 September 2023.RHS Garden Rosemoor Flower Show - 18–20 August 2023.RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.RHS Hampton Court Palace Garden Festival - 4–9 July 2023.
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