Spigelia marilandica

Bright lipstick-red tubular flowers open to traffic-sign-chartreuse interiors, an electric color combo that bedazzles every human and hummingbird in the neighborhood. Verdant clumps of paired oval leaves stay healthy and handsome all season. 

Full to part sun; average to moist soil; 2'x1'; summer; Zone 5

Propagated from seed; deep 3.5-inch pots