I believe the nectar flow is in full swing now in my area of Michigan as we just finished the Black Locust and I see the Dutch Clover and Yellow Sweet Clover are in bloom as well as many other roadside flowers I'm not familiar with. So you'd think the honey supers would be filling right up! Unfortunately my medium supers of Acorn plastic foundation are going untouched. I even put a fresh coat of melted bees wax on them and still the bees show no interest in drawing them out. There are also no excluders to restrict their upward movement either. Any suggestions as to why my bees have lost interest? So far we have had a bad spring. It seems we get sunshine one day and rain the next 3.