True on the above-ground parts, though my experience is that plants that have a root system and some path to sunlight will find a way regarless of how much is sticking up above the surface!
This morning I "enjoyed the challenge" of using a shovel to clear a driveway and two sidewalk cuts to the street which were clogged by what the plow left behind on the night-plow street. The wind chill here is in the minus-teens F at the moment so I "enjoyed" it for as brief a time as I could. I'll haul out the snowblower for the greater amount of work I'll have when the plow cuts through our street. Should be in the minus-single-digits by then...