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Understand and Fight Blight

Give Your Plants a Fighting Chance.


Blight is bad, but it can be prevented. There are two types of blight, which tend to most commonly affect tomato and potato plants. Late blight kills plants outright and is easy to identify as plant material becomes completely blackened. Late blight is a highly contagious fungus that disperses spores through the wind, so it is very important to prevent late blight. Once a plant is infected, it must be destroyed.


If you see dark brown spots on the leaves of your tomato plants, you might have just detected early blight. To prevent those spots from becoming larger and causing the leaves to turn yellow and die, grab your PreGro Plant Sprayer. This lightweight garden sprayer utilizes an easy-to-fill glass container which allows you to use any liquid fungicide you choose. Mix up a home-made solution with inexpensive, natural ingredients, which can be quite effective at combatting early blight.

You Will Need:

  • 1 cup organic whole milk
  • 2 cups 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 Help Prevent Blight



Using a quart-sized pitcher, combine 1 cup organic whole milk with 2 cups of warm water. Add 3 drops of non-bleach liquid dish soap to the mixture and give it a quick stir before pouring 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 tomato or potato plants with your milk-based fungicide, spraying both healthy and affected vegetation once a week to make sure fungus spores do not spread throughout your garden.


Important Tips:

  • Test your homemade solution on a single plant to make sure the solution is not too strong and will not have adverse effects.
  • Spray this natural solution in the early morning or evening so a hot or sunny day will not cause the liquid to heat up and burn the plant material.

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.