Re: cold damage
If the leaf is brown or yellow you can cut it off, otherwise leave them. I don't know where you live (what zone) so further advice is difficult. Good luck!
Men In Nursing- "A Few Good Men"
"Gardening is the purest of human pleasures." - Francis Bacon
"If by a liberal, they mean someone who looks ahead and not behind; someone who welcomes new ideas without rigid reactions; someone who cares about the welfare of the people, their health, their housing, their schools, their jobs, their civil rights, their civil liberties; someone who believes we can break through the stalemate and suspicion that grips us; that is what they meant by a liberal, I am proud to be a liberal."
John F. Kennedy, September, 1960