How to Remove Powdery Mildew: Easy Method You Can Try at Home 2022

How much are you familiar with the diseases of plants? Have you ever experienced letting your favorite plants die when you started gardening for the first time in your life? Gardening is known to help relieve stress and learn the critical life lesson of patience. However, it is not always easy to keep your plants healthy. Bugs can ruin your plants’ growth, and you should know how to prevent and treat them. But it can also stress you out all the time by taking care of plants to keep them healthy.

Among the diseases of plants, powdery mildew is one of the most common diseases that appear on roses or hydrangea.

Why Is It Bad?/Symptoms

Leaves infected with powdery mildew may gradually turn yellow, fall off, and spread the fungus to other plants. It may cause the leaves to twist and distort, and the shoots will have a deformed appearance.

  • On the lower surface of the leaf, white patches of fungal growth appear. When conditions are favorable, the patches enlarge and merge to cover the entire lower surface.
  • The leaf edges curl upwards, showing white, powdery fungal growth
  • On the leaves, purple or reddish blotches may appear.


Powdery mildew typically appears first on new growth during the warm, dry daytime followed by cool, moist nights. Even though the upper leaf surface seems normal, there can also be extensive fungus growth on the underside of the leaves.

The place can be poorly ventilated when you raise them on the veranda. In the spring and fall, the daily temperature range widens. This means the mold is likely to multiply in this condition. During steady or repeated rainfall, control may not be necessary until the dry months of late summer.

How to Prevent Them

  1. Do not plant roses in shaded spots, especially in areas that tend to dry out slowly in the morning. 
    • The mold is likely to develop in moist, and shady areas that lack air circulation.
    • Make sure you provide adequate air circulation without crowding too many plants.
  2. Use sulfur.
    • Sulfur products have been used to treat powdery mildew, but they are only effective if applied before disease symptoms appear. Sulfur can be found in dishwashing detergent.
  3. Use mold remover.
    • Mix one teaspoon of mold remover with two cups of water and stir in a spray bottle. This method can be effective even after the symptoms appear. You can spray it where you can see the white area on the plants. Don’t forget to sprinkle it on the back side of the leaf as well.
  4. Use baking soda or hydrogen peroxide products.
    • Baking soda alone is not effective at controlling powdery mildew, but it works well as a preventative when combined with liquid, non-detergent soap, and water.
    • Dilute baking soda (1-3 teaspoons) with water and spray on the infected area. 
    • Diluting 1-3 teaspoons of hydrogen peroxide with water can be used as well.
  5. Apple Cider Vinegar.
    • Mix 2-3 spoons of apple cider vinegar with a gallon of water and stir it well. However, the plants can be burned by too much vinegar. Be careful about controlling the proportion.


Powdery mildew is a very common disease, as it can survive even in winter in a variety of ways. However, these ingredients are very easy to get without extra cost. Try one of these easy hacks, whichever works for you, and make your dream garden.

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