By Alanyates
United Kingdom 
I have clumps of Arum Lillies some in pots and some in the ground. Last year the large white flowers were prolific and gave a great show for several weeks. I gave them no protection over the winter and now they still look strong but are a bit frost damaged.
My question is, should I just trim them a bit, leave them or cut them right back.
Your advice would be appreciated
9 Apr, 2016
Answers
I have some in the pond and I cut them down to their base in November. They've just started coming back. The year before I didn't touch them and they were fine :)
9 Apr, 2016
Mine also have brown tips, as they usually do because I never get round to protecting them. I don't do anything about it and if those leaves are unsightly I just cut them off as Seaburngirl says, but later on, when more unfrosted leaves have grown. My main problem with arums is slugs.
10 Apr, 2016
I'd wait until you can see new leaves forming then cut the old ones off.
Welcome to GoY too. :o)
9 Apr, 2016