Plants for early pollinators

Our erratic weather pattern this year brought out tiger swallowtails, and hummingbird moths in March. Of course, we have bees too. I see them during any warm period here. What plants can these early emergers use to survive? I have observed bees on the paper bush, willow amsonia, clover (it bloomed early this year), and the hellebores. The humming bird moth used the blue creeping phlox. The butterflies didn't have any use for the paper bush. They alighted on it, but quickly flew away. I planted phlox divaricata last weekend which is listed as a nectar source for butterflies. Hopefully, this will help them in the future.