Last fall I planted some yucca roots a friend dug out of a garden...all year long I had nothing to show and I just stepped out day b4 yesterday (Jan.4th) to discover I had 4 sprouts that were several inches long?!? Do they normally stay 'dormant' for a year to finally sprout in cold winter? We've had plenty of snow/ice/cold so far this year but just recently in the last few days the temp. has pretty much maintained a constant 40-50's.....at night chilling down to mid to lower 20's. Is this going to harm my new 'family'?