QuestionsHow to growTrees and ShrubsFeedingfarmyard manure & heathers 0 Vote Up Vote Down Bronagh Crowley asked 8 years ago Is it safe to put farmyard manure around heathers ? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Farmyard manure is too rich for heathers unless it is very old…several years. Use it on vegetable ground instead.