Posted: 13/04/2015 at 23:09
Your pH level (pH = acidity or alkalinity) can be adjusted by using lime or potash. I feel that the insignificant amount of potash present in wood ash wouldn't make much difference. I think applying lime at the rate of about 1.1/2lbs per sq yd would be required.
Having said that, lime is better applied in late winter, not now.