How much insulation does 1ft or more of snow usually add ?
I live in a climate that is almost guaranteed to have residual snowfall whenever there are periods of extreme cold. The historical record low is -22F, but on an average winter, I can expect the lowest to get around 0F, but whenever it gets even close to that temperature, I usually find my bamboos completely covered up by a good layer of snow since the cold spells generally come right after a snowstorm.
Does anyone know how much this snow can insulate temperate bamboos?
I am assuming that if it does reach something crazy like -15F this winter that the snow cover will still insulate the bamboo to around 5F since the snow acts a a very good insulator and there is also the natural heat from the earth.
The lower sections of the bamboo have generally been untouched as long as they have been under the snow the whole time, and I grow many varieties of phyllostachys and fargesias which often only leaf burn if their leaves are exposed to the air.
Here's a picture of what 4 inches of snow will do to my moso, so 1ft of snow will cover it completely since it only takes a little bit of wet snow to bring the culms to the ground.
Here is a link that might be useful: moso in the snow