Ash fertilizer

[NicolasGarcia]

Hi all!
I have a fireplace at home that I use a lot in the winter months, I use olive wood because where I live is where more olive oil is produced in the world and there are many olive trees and easy to get. I would like to know if this ash from the fireplace will be used to add it to my garden for the fertilizer and how much ash would be suitable.
For the fertilization of my garden I use earthworm humus, cow manure and straw and dry leaves every year.
Thank you so much
Nico