You may substitute the fertiliser with a supernatant resulted from mixing soil and water and is let to sit for a while. The soil contains various elements necessary for the plants’ growth, which dissolve into water after mixing the water and soil.Let the solution sit a while – half a day to a day and the soil and water will be separate.Remove the residues on top and use the aqueous solution resulted (this is the supernatant) as a fertiliser for your seeds.If you are experimenting with soil as a medium, you do not need fertiliser. The soil contains the elements necessary for plant growth.
AHiS 2021 – How to fertilise your seeds
