Thank you all for the great advice and welcomes!
I already have some succulent soil here for my Cacti seedlings, so I'll plant them in that. For my Cacti I usually mix the soil with sand and put river rocks at the bottom of the containers for drainage. Could I do that with these plants?
Our weather here on Long Island in NY is still really all over the place ( was 70 degrees last Wednesday, but dropped to 45 degrees the next day!) and the rain has been out of control. I have a grow light for my Cacti because my apartment doesn't have many sunny windows, should I put the cuttings under that after I've potted them?
I'll make sure to separate the Tradescantia zebrina from the others.
-And Kate, your plants look great!
