He warns that sprinting to the garden centre, piling in plants and furniture without a clear plan, wastes money and often leaves outdoor spaces disappointing. Danny Clarke’s warning for Love Your Garden fansSpeaking on the BBC Gardeners' World Magazine Podcast, Danny Clarke was asked what he sees as the number one gardening mistake. The ‘biggest mistake’ gardeners make, according to the ITV expertInstead of a makeover in a weekend, Danny Clarke argues for a slow redesign. He said: "If you feel lost at what to do just go and sit in your garden, enjoy the space, sit there with a cup of coffee." How to slow down and let your garden plan emergeClarke builds his designs around everyday life outdoors.