This is a crappy day for rain in the NE.
I am trying to look at this from a logical standpoint. Last year I had 4 trees in standard, pre-holed black containers. For me, if I over watered or it rained hard all the fertilizer washed away. But if you have a sealed bottom, you could possible have the roots lie in too much water and rot,but fertilizer stays contained.
Now, I am thinking about a way to cover the top of the pots and put in drip irrigation.
Serves many purposes-less evaporation, prevents critters from digging up roots, and control rain water entering. I am assuming the same can be said for young cuttings as well.
My goal is to get a thick clear tarp for painting, cut holes and slit for getting around trunk. Attach Velcro to slit to close around trunk. Then for tightening around pot, use the Velcro again or small bungee cord to hold against pot.
I have not done this yet, put plan on trying when I have time.
Just an idea.