I don't use the bag method. Instead if you get a large enough pot you can get pot liners. I got these at walmart. you could drill holes around the top edge of the pot and put some kind of screws around the edge but I used duct tape that I rolled part way up making a lip and invert the liner and put it on top. This way you can regularly check cuttings and water if needed. Also gives just enough air movement to prevent rots and the like.
pictured are doris and salmon rooting and in the adjacent pot some already rooted and left open soon to be potted. Chris
pictured are doris and salmon rooting and in the adjacent pot some already rooted and left open soon to be potted. Chris