This Autumn is showing a prolific outbreak of Honey Fungus mushrooms in many gardens. Working in the South of England I constantly come across that disease in gardens. Normally when some shrubs are infected, after removing the plant, I dig a narrow trench about a foot and half deep between the infected area and the rest then fill it up with clean compost. More recently, I’ve been installing root barrier membranes but there is no guaranty of success. My advice to clients is always to feed the neighbouring shrubs with a high potassium content to help building up some disease resistance.