Mine get completely dry as in there is NO moisture in there,with Airpots this promotes oxygen movement within the root zone,I've been using this method for 2 years with absolutely no problems.
I press my finger into the soil and if the top 2 inch is completely dry so it's time for more food for the girls ..
Maybe it's not right but it's worked so far
Sincerely TBB
That's actually the method I use and this is why I came up with this much water.
Maybe the reason is the medium that I use and with Plagron that would be different. We'll see next run.