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Pinpoint and Protect Plants from Powdery Mildew

Thwart the Mildew. Fight the Fungus.


If you know which plants are most susceptible to powdery mildew, you can be prepared to prevent this fungus from attacking your flowers, fruits and vegetables. Though roses, lilacs, phlox, and zinnias are most sensitive to this disease, powdery mildew can also damage your cucumbers, melons, squash, beans, and grapes. While powdery mildew is not likely to kill your plants, it is very important to control this fungus once you realize it has entered your garden.


If you notice a fine white or grey powder on the leaves of your plants, grab your PreGro Plant Sprayer. For a quick and cost-effective solution, mix up an all-natural, home-made fungicide and pour it into the easy-to-fill glass container. Use this lightweight garden sprayer to help prevent powdery mildew from forming or control the fungus once it has started attacking your plants.

You Will Need:

  • 3/4 cup (6 oz.) organic whole milk
  • 1.5 cups (12 oz.) warm water
  • 3 drops liquid dish soap *make sure there is no bleach in the dish soap
  • Quart-sized pitcher
  • Stirring utensil
  • PreGro Plant Sprayer

DIY Recipe to Prevent Powdery Mildew



Using a quart-sized pitcher, combine 3/4 cup organic whole milk with one and a half cups of warm water. Add 3 drops of non-bleach liquid dish soap to the mixture and give it a quick stir. Then pour the 18 oz. milk-based fungicide into the PreGro Plant Sprayer 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. Thoroughly drench your plants with your milk-based fungicide, making sure to spray both the top and bottom of the leaves as well as the blooms, fruits, or vegetables. Spray the plants once a week, thoroughly dousing both affected and healthy plants to prevent fungus spores from spreading.


Important Tips:

  • If you make more than 18 oz. of a milk-based fungicide, use the entire batch of solution right away. DO NOT STORE the excess milk-based fungicide for use at a later time.
  • Test your homemade fungicide on a single plant to make sure the solution is not too strong and will not have adverse effects.
  • Spray this natural solution on your plants in the early morning or evening so a hot or sunny day will not cause the solution to heat up and burn the plant material.
  • Stop spraying when the fruit or vegetables begin to ripen to avoid leaving a milk residue on the surface.

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.