WhIte Lines around mask on trees

I am building a composite landscape with a new sky. I eliminated the old sky using color range and I ramped up the fuzziness around the mask to eliminate  halos and ghosting around the pine trees, Now I have these white lines. I have watched a lot of videos on the subject but need help fast - I am printing these large - 42x62 - for a show at The Southern Vermont Arts Center and I cannot have these lines in the prints. Thanks so much for the help!  Evan