Should I also produce and sell vermiwash along with vermicompost?

Vermiwash is the liquid that drains through a vermicompost bed and is sold as a liquid organic input that farmers dilute and spray or apply. If your bed design lets you collect the leachate cleanly (a sloped bed or tank with an outlet), vermiwash can be a useful extra product from the same operation at little additional cost, so it improves overall returns. Keep it as an add-on, not a main income, since demand is for organic and natural-farming customers and is modest. Collect, filter and store it properly and sell it fresh, and label realistic usage rather than over-claiming results. Confirm a simple collection setup and dilution advice with your KVK, and target the same organic buyers who take your compost.