Temperatures are forecast to possibly fall below ten degrees (Fahrenheit) this week, maybe even closer to zero. This shouldn’t be a big deal, but in recent years near zero degree temperatures are unusual that once were routine. In this garden, the problem is that a number of marginally cold hardy plants are in the ground and not in pots that can be moved to shelter. It’s likely they’ll all survive, but I’ll give them a little help, just in case.
The standards in our gardens, hollies, azaleas, hydrangeas, and most everything else, require no protection in this cold. I recall days, years ago, when these were killed by subzero temperatures, but that seems long gone. Now, I’m only concerned with fatsias and scheffleras that were planted to intentionally stretch the limits of cold hardiness.
For most of the plants in our gardens, the biggest threat from cold damage is in March and April as the weather turns to spring, but with an occasional freeze sneaking in. But, this cold shouldn’t be a problem, except for the few tender plants. So, for the next few days I’ll stretch a frost cloth over younger plants. This will warm them by a few degrees, just enough. An older fatsia will have no protection and I expect all will be fine.
Ramblin' through Dave's Garden 
Japanese aralia is impressively resilient. It is amusing, although not too weird, to see it with snow on it.
A few years ago a fatsia suffered some damage at 3 degrees. The forecast is for a low of 2 this weekend, but plants might be covered in up to 10 inches of snow.
How tall are they?
Two are about 30 inches tall. This is the one that suffered dieback at 3 degrees and a younger fatsia that has grown more vigorously in part sun. A few others are half this height.
So, ten inches of snow would not cover them.
Since a few smaller ones were planted this year they’ll be covered by frost cloth, and if the forecast of 2 degrees holds it’s likely I’ll cover the best of the larger ones and test the cold toletance of the other.
Do you expect that, if it dies back, that it will regenerate from the roots?
At 3 degrees leaves and stems died back but it did not die to the ground. If we get the predicted snow I expect no greater damage than to lose some top growth.