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Soil Drench using Coffee Grounds

If you are growing roses, tomatoes, blueberries, or any other plants that require soil with higher acidity, consider creating a coffee-based soil drench.

You Will Need:

  • 6 cups of coffee grounds
  • 5 gallons of water
  • 5 gallon bucket
  • Nylon stocking or fine mesh bag
  • Strainer, cheesecloth or fine sieve
  • Goggles for eye protection
  • Rubber gloves for skin protection
  • PreGro Plant Sprayer


Pour 5 gallons of water into a 5-gallon bucket. Place 6 cups of coffee grounds in a nylon stocking or fine mesh bag. Place the bag of grounds in the bucket and soak the coffee for 3 days. After 3 days, get your protective gear on to safeguard your eyes and skin. Remove the bag of coffee grounds from the bucket. Strain any remaining solids from the highly-concentrated liquid using a strainer, cheesecloth, or fine sieve. All solids must be removed from the liquid. Pour the liquid into the easy-to-fill glass container. Never shake the PreGro Plant Sprayer when the glass container is attached to the sprayer. The PreGro Plant Sprayer utilizes aerosol technology, but does not contain CFCs. For optimal spray, hold sprayer between a 90 degree angle and a 45 degree angle.


Important Tips:

  • Test your homemade liquid fertilizer on a single plant to make sure the solution does not have adverse effects.
  • Spray your plants in the early morning or evening, spraying the base of the plant and saturating the soil with the coffee soil drench.

The PreGro Plant Sprayer

Atomizes up to 18 oz., which covers up to 120 square feet.

Easy to control, this portable hand-held garden sprayer enables you to deliver a continuous and uniform spray to only those plants most affected by unwanted pests.