Guy BarterGuy Barter is Chief Horticulturist of the Royal Horticultural Society, having joined the organization as superintendent of trials at RHS Garden Wisley in 1990. Prior to that, he gained experience in the commercial horticultural world after grduating with a degree in horticulture. Guy now runs the RHS Members' Advisory Service, which provides answers to an enormous range of questions and supplies evidence-based advice for thousands of gardeners and is author of RHS How Do Worms Work and RHS Can Anything Stop Slugs. Read More Read Less
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