Interesting.. I hadn't thought of the warmth thing.. most of the cuttings on the floor were the ones that didn't make it downstairs.. the ones in plastic water bottles and other recycled containers down there are all thriving.. but they are up off the floor.. ( it is cement under tile) in the basement..
I really was upset too, cuz three people sent me some wonderful healthy cuttings.. the four long sticks in the bubbler tub are all leafed out, I am afraid to pot them up. since they are doing so well, last year I potted up the rooted sticks from the bubbler, and those are fine. *sigh* I had some really nice named brugs too.. saved all the tags so I can find some more.