Nectar and pollen are the main floral resources for pollinators and lack of food is believed to be one of the major causes of pollination. However, we don’t really know the food value to pollinators of the different flower species.
Plants with flowers rich in nectar like blue-flowering include, Russian sage, sea holly, catnip, salvia, wisteria and eryngium. Honey bees also love Vitex agnus-castus, the chaste tree, for its aromatic lavender blooms. There are some other flowers ideal for the bee nectar garden, such as, California fuchsia,verbena, penstemon, lamb’s ear or stachys.There are also herbs such as lavender, rosemary, calamint and basil are also an excellent nectar source for bees.