Bought potting soil instead of potting mix
I wanted to transfer my tomatoes into a much bigger container (~20 gallons) and give it to my mom. I ran out of my normal Miracle Grow potting mix, so I went out and bought some more, except I got cheap and decided to go with a generic brand.
Once I go home and fill the pots, I realize it is a mushy, gummy mess that hardly drains -- because I got potting *soil*, not potting mix.
So now I have 20 gallons of this gray, mushy mess. Is there anything I can mix in it to make it usuable? I have shredded sphagnum peat moss and 2 bags of compost/manure. I tried mixing some peat moss in there but it really didn't make a difference. Maybe the mix should be 90% peat moss instead?!