White Powdery Mildew: Success Story!

Being a fan of summer squashes, I was looking forward to producing an abundance of huge Zucchini Fordhook Squash from seed. After transplanting the zucchini from a pot to the garden bed, it immediately began growing its bright green tubular stems, broad leaves, and yellow blooms. Everything seemed to be going well, until one day, I noticed signs of trouble. White blotches appeared all over the large foliage, and the blooms were not yet producing as expected. My prized zucchini plant was suffering from white powdery mildew.


White powdery mildew is a type of fungi that plagues leaves with mold patches, often as a result of too much moisture. In our case, we were guilty of dense plant spacing, wedging the zucchini amongst two other squash varieties and large purple cauliflowers. This fungus hinders photosynthesis, therefore, depriving plants of nutrition needed to be productive. If ignored, white powdery mildew will take over the plant, turning the leaves from yellow to brown, until they shrivel up.


At about the same time I realized the existence of the powdery substance, a friend asked me if I’d like to try her new line of organic plant products. Lo and behold, a few days later, in the shipment of goodies I received from Completely Organic, were two little bottles of Plant PM Wash. I asked my friend if she thought this might cure my ailing zucchini, and to my relief, she said it would.  All of Completely Organic’s products are made up of organic, non-gmo ingredients that are bee, ladybug, and pet safe.  Best of all, their products are purely plant-based with no chemicals.

Following the directions on the bottle, and with the help of Andy, the company’s knowledgeable expert, I mixed the proportioned amount of the wash with distilled water and sprayed it all over the zucchini leaves. It’s called PM because it should be sprayed in the evening, or at night with a flashlight. This application method will have optimal results. During the dark night hours, the Plant PM Wash will soak thoroughly into the leaves, giving the sun a better chance at baking all of the proteins in the fungus, killing the unwanted mold.


During the first week of using the wash, I drenched the top and underside of every mold spotted leaf, two nights in a row. The morning after the first night, I noticed the mold spots had lightened up and the leaves were a rich radiant green. Within a week, the plant began forming two small zucchinis.


In the following week, I applied the plant wash again, two evenings in a row. Within days, the zucchinis began to bellow out like blimps. The growth spurt was amazing. Not only did the plant wash subdue the mold and green up the leaves, it also allowed the sunlight’s energy to penetrate and nourish the plant, boosting its growth and production of ginormous zucchinis.

There are residual mold spots on the leaves, yet they are not getting bigger, or spreading, which means these are just stains from the original problem. If you encounter the same problem, be aware that in the fall, the garden bed, infected plant area, will need to have a thorough cleaning and no remnants should be tossed in the compost.

The plant now has two zucchinis, about 16 inches long with 14 inch circumferences. And, they are still growing!  Others are also starting to form.

Our Zucchini Fordhook is looking healthier than ever. I just can’t wait until the weekend to pull them out and barbeque succulent seasoned zucchini spears for a get-together of family and friends.

Stay tuned for more Plant PM Wash miracles and our garden’s results with using Completely Organic’s All Plant Boost.  Check out their website for more information and products for purchase at:  CompletelyOrganic.org

3 thoughts on “White Powdery Mildew: Success Story!

    1. When it’s time to clear out the garden bed during the fall, any mold spotted leaves will go in the green waste- just to be on the safe side. Don’t want to add breeding spores to the compost if I can help it. We’ll turn the soil in the garden bed and let it dry out before planting for the next season- this will help eliminated any fungus lingering in the bed. We’ll also add soil and compost before planting. We turn our compost periodically so it doesn’t stay too moist in the same areas all of the time. We’re in southern California where most days are pretty mild and dry- not a lot of moisture in the air except from the occasional morning marine layer. I hope this helps and I look forward to seeing your garden evolve!

      Liked by 1 person

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