How to prepare potting mix for vegetables?

Mix 40% cocopeat, 30% vermicompost or composted cow dung, 20% garden soil, and 10% perlite or river sand. This gives excellent drainage while retaining moisture. Add one handful of neem cake and single super phosphate per 10 litres of mix. This blend costs around ₹80–100 per 10 litres when made at home.