The ones where I took off the potting mix and covered with clay pebbles look better than the ones where I left the potting mix on. I drilled a drain hole about half an inch above the net cups on my buckets out in the open in case it rains, but I didn't drill a hole on the buckets under a 40% green shade tarp. The tarp keeps the rain from going in my buckets. I will drill a hole latter when I got things figured out. It makes refilling easier.Did you drill holes in the sides of your buckets? I’m monitoring my buckets, using 6” net cups, and I’m not having any issues with air pruning, at least not yet. My plants are in clay pebbles and I didn’t drill holes in the sides of the buckets. I was wondering if I should, but haven’t changed anything yet.
Heat may also have something to do with how the roots grow. Anyway, I just pulled out a TYLCV infected plant in a 6 inch net cup and replaced it with another one. I rinsed the potting mix of this one and covered the clay pebbles with a round piece of plastic chicken feed bag and sealed it with duck tape, so it will have less moisture loss.
I put a single layer of clay pebbles on the bottom of my net cup and placed the roots in and filled it with clay pebbles while holding it up, so the roots resemble how it was in the pot.
I want to see how the roots develop with the plastic cover. In this bucket I drilled a hole at around 6 inches from the bottom and used a 3/8 gromet, 90 elbow, and put a piece of 3/8 tubing on the elbow to bring the solution level up to 1/2 inch above the bottom of the 6 inch net cup. If the roots are following the solution down to the 6 inch level and look healthy and white, I will take the 3/8 tubing off and keep the water level at 6 inches with daily refills.
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