I want to grow Barley in pots. I have nutrient soil, vermiculite and perlite in three different 40 kg bags. What would be the ratio of these tree when I mix these three soils? What is the function of vermiculite and perlite??
Vermiculite is generally used to help aerate the soil as well as retain water in the pots. We sometimes use it for germinating seeds. I think perlite has a similar function.