I too only pull the dead leaves. I like having a bit of green in my garden during winter - which has arrived in full with frost all week except one day of rain, which washed away the nice looking snow we had.
So now we have no snow and freezing temps... same old, same old. My plants do not like it, but at least I know the irises will be OK, even if they are covered in frost and drooping here and there.
The good news; other than taking the Dahlias inside to dry before they go into winter storage and raking up leaves and putting them in the beds to keep plants warm(ish), there is nothing I can do in my garden as long as it is frozen!
