Originally Posted by bugsNbows
+1. Additionally, the transition from cool season species back to warm season species next spring may be challenging. I've seen quite a few overseeded SA lawns that do worse after this practice. If lawns are hybrid bermuda cultivars or even zoysia, they seem to fare better after a winter overseed than does SA. Just my casual observation over the years.
IMHO it is the amount of over seeding that effects spring green up. IMHO anything over 4 pounds per thousand of rye will stunt the perennial turf in the spring by out competing it. MSME is about the only herbicide that control rye grass and should be applied just as the weather breaks for spring green up. BTW MSME is slow to show response, therefore timing becomes even more critical.