Wood ash adds K and raises PH like lime. Should be hardwood. You can add some to the compost pile.

Yeah. Wood ash is fine if the pH is around 6.8 or lower. It is a good amendment and source of K.

Sey

But if your native soil pH is already leaning toward the alkaline side then adding wood ash can really screw things up.

In other words you need to know your pH to begin with and you should also know if you soil actually needs additional potassium. Most soils don't. Only way to have that info is by getting a pro soil test done from your local county ag extension office.

Excess potassium blocks the uptake of magnesium, manganese, zinc and iron all of which are equally important to the plant..

Dave

Thanks for all the comments...