ANTLER SPROUTS - Young male deer shows his antler buds while taking advantage of grass greening up in our yard. Each year male deer shed their antlers after breeding season. Each Spring as the days lengthen male deer begin to grow a new set of antlers. Antler growth is incredibly fast - in fact, antlers are the fastest bone growth in the world. A deer can grow six-point antlers in just 3-4 months.