Cold roots or overwatering causes that? Very interesting I’ve learned so much and I’m so close to the finish line I don’t wanna lose control at this stage of my first ever indoor grow.. you asked about run off no I don’t water till run off but I have tried bottom watering in the tray and letting the plant pull it up worth capillary action. Water was never left in the tray it has always been completely absorbed..
With organics you want to keep the soil between 30%-60% saturation. No runoff and not bone dry. So yes I would probably go back to watering a bit less at a time. It's important to keep all the media moist UT you don't need to saturate it with ru off like synthetic.
If you raise en just up off the floor it may improve root zone temps.
Imo bottom watering is not a good idea because it only feeds the saturation zone and will create an even larger difference in moisture from top to bottom. Where the top will be almost bone dry and bottom soggy wet.
You don't want to let the soil dry right out bit rather allow it to take up a good lotionnof the saturation zone before watering again.
If they are drooping it's to long. With synthetic it's not as big of an issue but with organics the microbes responsible for the break down of nutrients to make them available need moisture or they will die (moisture as in damp or moist but not wet)
So once the soil had been saturated you want to keep it in a happy medium of being moist but not wet and allow it to take up water from the saturation zone before watering again.
If you wanna give them a quick boost you can brew a batch of terp tea grow and just give em a slight bump next feed. This allows the terp tea to be broken down into available nutrients before being added to the soil so its immediately available.