Hi there herbaltivo,

Not sure why nobody piped up to answer you, but maybe I can try. A couple of years ago I started up a grow in an unheated building, in the basement where it got cold enough to form ice on the walls. Similar deal as you, lost the electric heater during lights out. Plants showed similar things as you've seen, but all recovered tho it slowed things down for a little while, about a week if I recall correctly.

The plant that seems to be the better for it, just might be like people; adversity that dosen't kill you, just makes you stronger.
OM