Two products have their place in spray preparations. Black soap should be used diluted and 10% white vinegar can be used with dilution (as an acidifier with the spray preparation) or undiluted as a weed killer (in the presence of sunlight).
Two products have their place in spray preparations. Black soap should be used diluted and 10% white vinegar can be used with dilution (as an acidifier with the spray preparation) or undiluted as a weed killer (in the presence of sunlight).