Dear fellow JM owners, my 12 years old 5 foot high Acer shirasawanum Autumn Moons are all potted, living on a large 3rd floor balcony facing south west in plant hardiness zone 7b. From December until March, I usually put the pots on styrofoam plates, wrap the pots in burlap and bubblewrap, also the lower part of the main stem, and water the pots a little once a week during this dormant period (I have no garden shed, conservatory or garage where to put them). This "winter", we had spring from early December until February (around 50°F, some days even more, very unusual) and then in late March/early April, when spring used to begin in the old days, we had two weeks of "real winter" (around 10°F, on two days 0°F, windy). My Acers show dried buds and little dry twigs all over the little trees that until now (late June) did nothing - they are brittle and snap off easily, they are dry to the core. Is this frost damage? Shall I prune these off in November? Should I just do nothing and relax? Thanks for any advice!