The only one I have that stays red year round is this NOID. Wish I knew the name of it, but I don't, lost it many years ago. It is a smaller semp, about 2 to 2 1/2 inches across.
Rubikon Improved is supposed to stay red pretty much all year.
http://www.northhillsnursery.c...
Darjeeling is suppose to be red year round.
How long have you had your semps Critter? Just wondering if you have been through a full year with them to see if they will be making any color changes. You can also scroll through the semp part of the ATP database looking at the thumbnails until you see something that you like.
http://garden.org/plants/brows...