Bigleaf Lupine (Lupinus polyphyllus)
This member of the pea family stages an eye-catching display in late spring to early summer and is a bee favorite. Deep green leaves form a mound topped with spikes of blooms, usually in purple shades. Plants require evenly moist, acidic soil and frequently sprout alongside streams. Hardy in Zones 2 to 7, bigleaf lupine spreads easily and is considered invasive in some areas. Hybrids of the native type come in a variety of flower colors, including bright jewel tones and pastels.