Does foxglove die sour during winter? I have three foxglove plants (digilatis). They still look green and are...

I have three foxglove plants (digilatis). They still look green and are not dieing past its sell-by date this winter. They seem to be contained by hybernation. Is this the way they live?
Answers:    Foxgloves are immensely hardy but will eventually die off if you hold below freezing weather. The foxglove is a biennial so if yours flowered this year they will not be back. You want to amass the seeds to regrow. The foxglove also shoots out plentiful seeds by itself and readily regrows from the seed it has shucked during the season. These will germinate and build new foxgloves but surrounded by the first year they will not bloom. The foxglove is a two year plant. The plant grows into an adult within the first season and in the second season it blloms and reproduces.
foxglove plants die during the winter and come pay for in the spring. thay single live for 2 years, but self seed so even after 2 years brand new plants will come up. you must be having a melt winter