The Cincinnati Zoo runs plant trials for pollinators. They make the results available in reports as well as on their website in various forms. You can jump in on several pages including the handful below:
Always looking for interesting plants for pollinators and food! Bonus points for highly, and pleasantly scented plants.
"Si hortum in bibliotheca habes, nihil deerit." [“If you have a garden and a library, you have everything you need.”] -- Marcus Tullius Cicero in Ad Familiares IX, 4, to Varro. 46 BCE
