QuestionsHow to growFruitApplespotash 0 Vote Up Vote Down fons jaspers asked 16 years ago Gerry, ashes from wood fire are good as potash source, isn’t it? What about coal ash? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago There is very little nutrient value in coal ash. If it is gritty, it can help to open soil, but some coal ash is very soft and does not help.