Wood ash is a useful fertilizer, but it should be used with caution.
We'll tell you about three mistakes gardeners make when using ash.
How not to use ash
Firstly, you should never use low-quality ash.
We are talking about ash from burning fallen leaves, printed materials, plastic and other waste.
You also can't use ash from a barbecue as fertilizer. Ash from burning tomato and potato tops can be used.
The second mistake is to mix ash with other fertilizers, especially mineral ones. Nitrogen deficiency may occur.
In addition, you cannot feed ash to crops that prefer acidic soil, in particular, conifers, hydrangeas and roses.
For reference
Ash is a non-combustible residue formed from mineral impurities of fuel during its complete combustion.