Posted: 23/10/2014 at 12:33
I use my wood ash as a top dressing on fruit trees and fruit bushes. The only mention I found of it was an ancient gardening book, It says only top dress with it during month November to February.
I have done this then in spring lightly forked the residue into soil and top dressed as usual
I worked along the rows (2 pans a tree/bush) rather than spreading it about
I also put it into my compost bins thoroughly mixed
Not to sure about roses, I haven't done that
Do check that there are no chemicals on the wood (sometimes kindling has a bit)