Bring them in with this garden designed to bloom in each important bloom window using key pollinator plants. 
 
Each full-flat includes these 8 species (4 plants each) or equal species based on availability: Sand coreopsis, Purple prairie clover, Broad-leaved purple coneflower, Rough blazing star, Beardtongue, Smooth blue aster, Bicknell's sedge, Wild columbine
 
Pollinator / Bloom Window:
Early - Middle - Late