Hello Suzy and thank you for your question.
The Scotts Turf Builder WinterGuard with Plus 2 Weed Control should not be used on bent, carpetgrass, dichondra, lippia and St. Augustine (including Floratam) lawns. The centipede should be okay but you may need to determine if there are any other grasses in your lawn.
Additional specifications can be found here: http://www.scotts.com/smg/catalog/p...
Best wishes on your project.