What is the minimum terrace size for a productive vegetable garden?

A 50 sq ft terrace can produce 3–5 kg of vegetables monthly with 8–10 grow bags. A 100 sq ft terrace produces 8–15 kg monthly — enough to meaningfully supplement an Indian family's vegetables. Vertical growing, succession planting, and high-yield crops like spinach, methi, and tomatoes maximise small spaces.