Posted: 12/08/2014 at 18:30
Your post made me have a go at penstemon cuttings, did some yesterday and was wondering the same thing regarding the bag. Some people use the bags and some don't when they are taking cuttings.The advice I had from here was that you can leave the bags on until the roots show through or you can take them off. I've not ever used a bag before on cuttings, the freezer bags are great though! I have little tents in the green house!
The bag acts as a mini propagator, so you have to be careful to allow the moisture out. My gut feeling is that if they are still looking healthy and haven't wilted they will be fine with the bags off. That's probably what I will do with mine
I did some clemantis montana cuttings in the past and didn't use a bag and out of 6, 3 pulled through, I was pleased with the success rate.
With the amount you put in each pot, I would say it's personal preference. I tend to pot things about gradually into slightly larger pots each time and have been known to put more in a pot to get a bushier plant.
Be good to know how you get on