The main benefit of wood ash in the soil is to raise the soil pH, or make it less acidic and more alkaline. So you’d want to know your soil’s pH.
Roses enjoy a pH of 6.0 through 6.9 (slightly acidic). For pH outside this range, the availability of nutrients to the plant is greatly affected. So…if you already have neutral or alkaline soil, you don’t want to make your soil more alkaline.
If your soil needs to be even less acidic, wood ash is perfect for roses. Spread one-half to one pound of ashes evenly around a mature shrub or rose bush.
The main benefit of wood ash in the soil is to raise the soil pH, or make it less acidic and more alkaline. So you’d want to know your soil’s pH.
Roses enjoy a pH of 6.0 through 6.9 (slightly acidic). For pH outside this range, the availability of nutrients to the plant is greatly affected. So…if you already have neutral or alkaline soil, you don’t want to make your soil more alkaline.
If your soil needs to be even less acidic, wood ash is perfect for roses. Spread one-half to one pound of ashes evenly around a mature shrub or rose bush.