Native and Industrial (Honey Bee) pollinators are under increasing pressure from habitat degradation, changing agriculture and landscape practices and pesticides. Planting native ecosystems on any scale is a great way to mitigate this pressure. Native pollinators provide ecological free (No one gets a bill!) services to agriculture as well as the native ecosystems that they are a part of.
The following document describes in some detail the services that native pollinators supply.
Ohio Prairie Nursery has mixes designed specifically for native pollinators These mixes are high diversity and include species that bloom throughout the season.
Seed Specifications for Native Pollinator Mixes: