Um, you posted this yesterday, and both your location and your sig say you're in California. How exactly is it late summer in California in early March?Here is late summer and fall dearth. If not fed pollen sub, bees don't do well into winter and have more die offs by spring. I feed in cell builders too. Nectar and honey is carbohydrates, pollen is everything else. If not pollen coming in, then bees are undernurished and not healthy.