How much can I realistically earn from microgreens grown indoors on a small scale?

Microgreens can give good returns per square foot because they grow in one to three weeks and sell at a high price per gram, but the income is real only if you have steady buyers. The crop is easy to grow on racks indoors with low water and space, yet the bottleneck is marketing, since microgreens are perishable and demand comes mainly from restaurants, hotels, gyms and health conscious urban customers. Start small, line up two or three regular buyers before scaling, and grow varieties they actually want like radish, mustard, sunflower and pea shoots. Costs include seed, trays, growing medium and lighting if natural light is poor. Treat early reports of very high income with caution; the realistic earning depends entirely on consistent local demand, so test your market first.