Now, this doesn't seem like the kind of stuff plants would like to be growing in. I should have realized this was happening, because during the summer, when I watered, it would sometime pool up in the top of the pots, and take an hour to drain!! The way I was taught, soil should absorb water, but be permeable enough to let it soak through.
I found a number of fat worms in it, so it can't be that bad, but ...
OK, my bad, using cheap potting soil. Butt head against wall, etc.
But I still have a few bags of it, and it seems to me that with appropriate amendments, this stuff could still work. What should I use? Coarse sand? Perlite? Vermiculite? Compost? Peat moss? Now, if I'm going to add organic material to it, I'd like it to be stuff that didn't eventually turn into the organic paste I seem to have ended up with.