Vegetable gardening in upside down planters?

chlorina2006

New member
Background - I purchased 4 of the upside down hanging planters to grow tomatoes. I was going to purchase a name brand organic vegetable potting soil to use in the planters, when the garden center employee suggested using an amendment with my regular soil...

The planter is hanging in full sun (sunup to sundown) and gets good air circulation, but my tomato plants have white powder mildew at the base of the stalks...though the tops (bottoms as it's upside down) look healthy enough. I'm guessing the culprit is the yard soil contains spores and the water dripping from the planter, directly onto the plant, deposited the spores there.

I've been watering once a week in cool weather, twice a week in warm. I check the soil for moisture, so I'm not over/under watering.

My question is, how can I get rid of the mildew without using a chemical spray?

I was wondering if I added a small amount of white vinegar to the water if it would raise the pH level enough to be hostile to the mildew spores w/o harming the plant or affecting the taste/moisture/sugar/acid content of the tomatoes?

The tomato variety is Best Boy if that makes a difference. The plants are now a foot high (or low) depending on your perspective :) and in bloom.

Thanks!
 
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