Mushroom Farming Guide: An Income Business You Can Start in a Small Room

Why Mushroom Farming Stands Out

The biggest advantage of mushroom farming is that it doesn't need farmland at all — a shaded room, veranda, or small storage space at home is enough. That makes it a genuinely good income opportunity for people living in urban areas or with very little land. Oyster mushroom is the easiest and most popular variety in Nepal, and a solid choice for beginners.

What You'll Need

• Certified mushroom spawn (seed) — from a local agriculture center or a trusted supplier
• Straw or wheat husk (the growing substrate)
• Plastic bags or sacks
• A dark, humid, well-ventilated room (out of direct sunlight)

Step-by-Step Method

Step 1: Prepare the Substrate

Cut straw into small pieces and soak it in hot water (80-90°C) for an hour — this kills off contaminating microbes. Drain the water afterward so the straw is damp but not soggy or dry.

Step 2: Mix in the Spawn

Layer straw and mushroom spawn inside a plastic bag — straw first, then a scattering of spawn, then straw again, then spawn again, building 4-5 layers this way. Tie the bag closed and poke small holes in it so air can pass in and out.

Step 3: Keep It in the Dark

Keep the prepared bag in a dark, humid room for 15-20 days. During this time, the spawn spreads a white, thread-like growth (mycelium) through the straw — this is completely normal, so don't open the bag during this stage.

Step 4: Move It to Light

Once the white growth has fully spread, move the bag to a spot with gentle light (but no direct sun) and higher airflow and humidity. Small mushrooms start appearing from the holes in the bag within a few days.

Daily Care

Lightly mist the bag with a fine spray 2-3 times a day — mushrooms need a humid environment, but avoid pouring water directly on them. The room needs good airflow, or the mushrooms can start rotting.

When and How to Harvest

The first flush of mushrooms is ready to pick 3-4 weeks after spawning. Once the mushroom cap starts curling upward at the edges, gently twist and pull it out by hand. A single bag can produce 3-4 flushes over time.

A Common Problem

Green mould shows up when the substrate wasn't properly boiled or is too damp. Prevent it by boiling the straw thoroughly before use and keeping all tools and containers clean.

Market Opportunity

Fresh mushrooms have strong demand and good pricing in urban markets. Selling directly to customers through FoodSansar adds further margin on top of local sales.