Saxifrage cutting Propagation
Tree and shrub cutting propagation is old hat for me, but alpine cuttings are new. I just never got a round to it, and never had the need. Our MN Chapter of NARGS had a prop workshop lead by the owner of Rice Creek Gardens, know nationwide for choice alpines.
I really didn't care to much about some of the materials we had to propagate, like dianthus, but I did take pieces of a few different sax(mossy and encrusted). Applied some weak IBA talc (.1%), and stuck in a medium of half soiless potting mix, half perlite. Watered, enclosed in clear bag. Simple methods.
Now my question: being alpine in nature, I imagine I can't just keep the bag enclosed for weeks like I do my woody materials. She said to only leave the bag sealed for 3-5 days. Then what? Should I completely open it for an hour a couple times a day . . . leave it partially open all the time? What do you think? What are your experiences?