Hi I was wondering if your water pH right out of your kitchen tap is over 8 if you still have to add baking soda or apple cider vinegar ect: to spray plants for powdery mildew i see a couple spots on my plants and my friend has it way worse.
Thanks for your advice
Hi, I have water flowing from the tap PH 7.6. PPM 65. The water is the purest from Lake Baikal. But I do not spray plants in my tent lamp HPS possible burn. Measure PPM, EC of water maybe it has a lot of salt in it.
I only have a blue lab ph pen can’t measure ppm or ec
You shouldn’t have to check for PH if you are spraying (during lights off).
Here are some solutions people have used to combat PWM:
MIlk/water 9:1 ratio
Baking Soda 2 tablespoons per gallon
Hydrogen Peroxide 35% 1 teaspoon per gallon.
HTH.
