It all depends on your area. On one of our properties, I refresh the cane site twice a year. They absolutely destroy it. ( I have to move the spot around the area because of the craters they dig) It's also great for pictures, and they only hit it hard Spring and Summer and maybe into early fall. On my other property about an hour away, I've tried several different cane spots and they just kinda paw at it visit infrequently. It's all in the soil! I recommend the powder form. Put some out late February and and refresh late July.