QuestionsHow to growTrees and ShrubsFeedingPractical use of turf ash 0 Vote Up Vote Down Barbara O\’Brien asked 15 years ago Is there any practical gardening use for turf ash from the firegrate, please? Surely it would be ‘biodegradable’. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Turf ash can be spread over the soil in any part of the garden, but it has almost no plant nutrients and no beneficial effect on soil structure. It does no harm and does no good.