organic homemade remedies for powdery mildew

daylilyfanatic's picture
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Printer-friendly versionI was wondering if anyone knows of an organic homemade remedy for powdery mildew. I was told that baking soda works great as a powdery mildew preventer. The only thing I've heard of is soap but it does't seem to really work. If you have any ideas Please let me know.

 DLF . . . Daylilyfanatic "Gardening requires lots of water - most of in the form of prespiration. ~Lou Eri


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Two things have worked well

Two things have worked well for me - watering as much of the garden as possible with a drip system and using Neem oil on the infected plants AND those close by as soon as any mildew shows up. The neem oil comes in several brands so you will need to look at the labels. I do keep the garden cleaned of old plant material as well.
WildIris's picture

Thanks for the

Thanks for the information...Will be trying this myself.
Lavender2's picture

Remedies - prevention

Ahhh, the dreaded powdery mildew! What a pain! My worst problem has been my perennial phlox. Every year they were beautiful, then they start to bloom, and BAM... ugly white fungus! I tried the fungal sprays, but admit that I most likely didn't spray them as often as recommended so I can't blame the product for not working................ I have not tried home remedies, but this site lists a few that I think may be worth trying... especially if your problem is with vegetable crops or an extreme case... http://gardengal.net/page11-1.html .................. I HAVE won the phlox mildew war, though... by careful garden cleaning and thinning out plants. It has worked amazingly well for me!............................. Powdery mildew spores overwinter on plant debris left in the garden. The spores begin to grow in early spring and are spread around by wind, splashing water and insects. I have controlled it by removing ALL susceptible plant material in fall, and any mildew infected material as soon as I see it. A very important key is air circulation. In spring, I thin out the phlox plants considerably, removing all the shorter growth (these will not bloom anyway)... more energy is saved for the productive growth.... Other tips... always try to get resistant varieties, blast your plants with a strong spray of water once in a while (it washes the spores off the leaves and may slow the spread up the plant), plant susceptible plants where they will get as much sun as possible, avoid wetting the leaves - water the ground.................. Best of luck! Please let us know if you find something that works for you, or if you find other tips we can use.
Chellflower's picture

Mix 3% peroxide with water at

Mix 3% peroxide with water at 2 1/2 tsp. per gallon and spray on plants. Cinnamon is also a natural fungicide that can be sprinkled onto plants and soil.
daylilyfanatic's picture

powdery mildew

Thanks for all your suggestions. I'm just wondering how much cinnamon to use? Do I mix it with water? I've also heard that baking soda works as a prventitive is that true? and if so how much do I use? I'm really looking for somthing to prvent the powdery mildew Itried harpin protein whish worked well on my tomatoes but had no effect on the cucumbers. I'm already trellising my cucumbers so there's not much I can do to improve air circulation. and I did dispose of all the diseased plant material. PS. So far the only Problem I've had with powdery mildew has been on cucumbers. I'm growing a more resitant variety next year but I still want to grow my straight eight cucumbers so any suggestions how to stop this fungal disease will be greatly appreciated.

 DLF . . . Daylilyfanatic "Gardening requires lots of water - most of in the form of prespiration. ~Lou Eri