Irv,
In the early EarthTainer days when I used only Miracle-Gro Potting Mix (no bark nor Perlite), I occasionally would find an earthworm or two. Since I have been using the 3:2:1 Combo Mix, I haven't seen any.
I have mixed thoughts about this. While having worms in the EarthTainer Mix might be viewed as a good thing, I am thinking it may indicate the Mix is too compacted if they survive in it. In any event Irv, I would think about adding some more microbark / Perlite into your Mix for next Season.
Raybo
