White Powdery Coating on Leaves? Yup, That’s Powdery Mildew

Posted on Apr 11 2012 - 1:09am by Mike Lieberman

There is a white chalky substance on the leaves of your plants.

Your container garden looks like Pablo Escobar and his boys had a party in it…

…What happened?

Don’t worry that white powder is not cocaine, it’s powdery mildew.

You’ll notice that the powdery coating is on both sides of the leaves and will eventually start to spread.

Those leaves will eventually turn yellow and die. It can also cause the leaves to twist and turn.

Your container garden looks like Pablo Escobar and his boys had a party in it. What happened? — Tweet This

Vegetables commonly affected by powdery mildew

  • Cucumbers
  • Peas
  • Squash
  • Tomatoes

Dealing with powdery mildew

If you are first starting to plant, then one effective way to prevent powdery mildew is to allow for air circulation by pruning the leaves, especially at the bottom. This is because excess moisture is a common cause.

Once powdery mildew strikes, you can combat it with a homemade spray using baking soda and water.

There are also organic fungicidal sprays that you can use as well to help, such as Safer Brands Garden Fungicide.

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Win a Safer Brand Organic Insect & Fungicide Gift Pack

Lucky for you I am now running a contest on Facebook (through April 12, 2012) that includes the Garden Fungicide as part of a gift pack. Check it out and enter today.

Your turn

After you’ve entered the contest, in the comments below let me know which plant of yours has been affected with powdery mildew.

Image courtesy of Jeff Kubina on Flickr.