1) Depends on how fast you want to get the new colony going.
2) I would wait til it is more established.

Hi- I have successfully moved several types of moss to cover a concrete "bunker" in my yard. Be sure to bring some soil with the patches and water them often. Mosses grow slowly, but your patience will be rewarded!

squirrel girl,

summertime is generally moss hibernation time unless you constantly water. By all means try tranplant first because the blender metthod relies on moss being kept wet/moist till the moss goes through the protonema stage, "fine green threadlike strands that later develop into moss". Even mature moss needs moisture to grow well. To improve moisture in the summer, cover ground with frost cloth to raise humidity or even plastic if ground is well shaded. Water with rainwater or distilled and if you do keep moss well hydrated then use an acid fertilizer, like for azaleas. Humidity, fertilization, warm temps (not too hot) and proper shade/lighting can casue moss to grow rapidly.

Rick