How to Make Liquid Fertilizer for Grass

Perfectly green grass is the dream of many homeowners. Simple watering is often not enough to maintain a lush lawn. Dozens of commercial lawn fertilisers are on the market, but they often depend on various chemicals to fertilise your grass. You can make a liquid fertiliser at home using natural ingredients as an alternative. The liquid fertiliser is absorbed by the ground and grass faster than dry fertiliser, and you know you are enriching your soil without harsh chemicals.

Obtain 20.4 Kilogram of aged chicken manure. This may be purchased at your local garden supply store or nursery. Alternatively, purchase cheap manure from a local poultry farm.

Shovel the manure into a burlap sack. Tie the top of the sack closed with a rope. Make sure the knot is tight. Place the bag in the bottom of a 35-gallon plastic container, such as a dustbin or a storage bin. Put a concrete brick on top of the burlap bag.

Fill the plastic container with water. Cover the container or bin. Let the burlap bag filled with manure sit in the water for three weeks. The water will penetrate the manure mixture, which will slowly leech nutrients and minerals into the water.

Use the shovel to fish out the brick and burlap bag at the end of three weeks. Discard the used manure or empty it into your compost pile. The resulting water will have a 1% to 2% concentration of nitrogen, phosphate and potash.

Boost the manure water's vitamin content further by adding liquid fish emulsion, obtained from your local garden supply store. Follow the emulsion manufacturer's product specific instructions, supplementing the manure water for the water required to dilute the emulsion. Typically, 1 to 2 tablespoons of emulsion are used per gallon of water. Mix thoroughly.

Empty a portion of the nutrient-rich water into a watering can and use it to water your lawn once a week. For best results, water in the early morning to allow the grass to draw on the enhanced water during its daily chlorophyll-producing process.


Using fresh manure instead of aged manure can burn your lawn because of the fresh manure's high nitrogen content. If you obtain fresh manure instead of aged manure, age it manually by mixing it into your compost pile for four to six months. Use the manure and compost mixture as a substitute in Step 2.

Things You'll Need

  • 20.4kg. aged chicken manure
  • Shovel
  • Burlap sack
  • Rope
  • Plastic 35-gallon container
  • Concrete brick
  • Fish emulsion
  • Watering can
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About the Author

Joshua Duvauchelle is a certified personal trainer and health journalist, relationships expert and gardening specialist. His articles and advice have appeared in dozens of magazines, including exercise workouts in Shape, relationship guides for Alive and lifestyle tips for Lifehacker. In his spare time, he enjoys yoga and urban patio gardening.