Deer will dine
"Vinca is a beautiful ground cover that always gets compliments. The deer will eat it down to the ground during the winter in Southeastern Pennsylvania. If you plant vinca in the eating path of deer, you will be very disappointed in spring when you see the plants begin again - green with periwinkle flowers - knowing you will never achieve the lush ground cover you wanted. Vinca is easy to trim back if it grows too forward of sidewalks, lawns, etc. Vinca is invasive and can hold litter from trees, so maintenance is required. Vinca enjoys routine feedings and will flower all season."