We can start them early with the wicking ropes and it doesn't prevent the roots from following the water level down. In addition, the bottom of the net cup doesn't have to be touching the water or nutrient solution at the beginning as long as the wicking rope is in the nutrient solution, so I didn't really need to install an on/off valve on the bottom of my connected buckets, but it's good to have for cleaning and changing plants.Thanks for the follow up! I may try the wicking rope in my buckets this fall. We are so dry and I think this will work well for my starts so I don’t have to water at first.
Once the roots reach a certain level, its best to set a constant level with a float valve and nutrient reservoir. Because the water level can go down, but it cannot increase over an inch. A professor did research on this, and I also found it to be true.
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