Depends upon what is available to the deer in your area. Trace mineral blocks are utilized heavily during antler growing in spring-Summer and as soon as bucks go into hard horn sites stop being visited by bucks. Same for does during pregnancy,fawning, and nursing of the fawns but almost none at all once the fawns are weaned - That tells me it is something that is lacking from their environment for that time frame... If it was something they just simply crave like you do doughnuts then I am pretty sure it would not matter what time of the year, they would still hit it but they don't...only in the formative stages...