Know the type of timber you’re burning and you will know your ash. If you are burning hardwoods like eucalypt, then you will make a nice dense wood ash that has many of the minerals in it that the trees had. Softwoods like pine are okay, too, but will create a lighter, finer wood ash. Never use wood ash produced from timbers that are treated, stained, painted or otherwise tampered with – they’re very toxic and that kind of ash needs to go in the bin. If you use the commercially available charcoal, briquettes or heat beads in your fire, dispose of that ash, too; they can have added chemicals.
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