Compost tea is a liquid fertilizer made by soaking compost in water with a simple food source like molasses, then aerating the mixture to boost beneficial microbes. By producing this nutrient-rich solution at home, farmers can bypass expensive store-bought chemical inputs and improve soil health using natural enzymes.
What Is Compost Tea?
Instead of relying on commercial liquid fertilizers, you soak compost in water, add a sugar source, aerate the brew for 24-48 hours, and spray the resulting tea on your crops. This process delivers essential NPK nutrients, beneficial microbes, and enzymes directly to leaves and soil.
Cost Comparison
| Fertilizer | Cost/Hectare |
|---|---|
| Chemical liquid fertilizer | $50-100 |
| Store-bought compost tea | $20-40 |
| DIY compost tea | $0-2 |
How to Make Compost Tea (Korean Method)
| Step | What You Do | Cost |
|---|---|---|
| 1 | Fill sack with 2kg mature compost/vermicompost | $0 |
| 2 | Fill bucket/barrel with 20L water | $0 |
| 3 | Suspend compost sack in water | $0 |
| 4 | Add 2 tablespoons molasses/sugar | $0.20 |
| 5 | Stir vigorously 3x daily | $0 |
| 6 | After 24-48 hours, liquid is ready | $0 |
| 7 | Dilute 1:10 with water, spray on crops | $0 |
Reducing costs from $50-100 per hectare to roughly $0.20 represents a 250x cost reduction, which significantly improves the financial stability of a smallholder farmer's season by freeing up capital for other essential needs.
Frequently asked questions
Q: Does compost tea require special equipment? A: No, it only requires a bucket, a sack for the compost, and water.
Q: Why is molasses added to the mixture? A: Molasses serves as a food source to feed and multiply the beneficial microbes during the brewing process.
Q: How do you apply the finished fertilizer? A: The mixture should be diluted at a 1:10 ratio with water and then sprayed directly onto the leaves or the soil.
For more on sustainable techniques, read our guides on Korean Natural Farming for Mozambican Soil: Zero-Cost Fertility from Master Cho or Vermicomposting: Indian Worm Farming Makes $500 of Fertilizer from $10 of Worms.
Maputo Bridge Capital, founded by Anselmo Boaventura in Fort Worth, connects sponsors with verified smallholder farmers like those in the COJAZ cooperative in Zambezia. You can help a farmer thrive by choosing to sponsor a farmer from $25; please note that these sponsorships are gifts to support local agriculture and are not investments.