Burning to make ash glazes

Everything I do is an act of grounding. I cut the hedging when they get too high it can take a week to cut. Then I burn the wood and green. It is mixed wood including ash, nut and holly. I burn the wood to white ash. Once the ash is cool I wash it in rain water then sive it. I may add clay and flux befire test firing. I wood fire to 1290-1350 degrees, gas fire to 1250 and electric to 1390 degrees.