With blooms similar to snapdragons, Catalina Midnight Blue Torenia works in the shade to spill from a container, or as a river of blue groundcover.
Blue jean baby.
Proven Winner
Superbena Royale Chambray makes a fresh pool of color in the sun. It can take the heat, brings butterflies, and doesn't need to be deadheaded.
Singin' the powdery blues.
Better Homes and Gardens
The Opera Supreme Light Blue Petunia deserves its own aria, with pale blooms that trail up to 3 feet. Or have it sing a duet with white angelonia.
Swirling blues.
Proven Winner
Mix a perennial Rose of Sharon Blue Satin with Laguna Sky Blue Lobelia, and frost with white Diamond Frost Euphorbia for a white-caps-on-the-waves look.
Fresh as a blue daisy.
Proven Winner
Bring a visual breeze to your cottage-style porch with a mass of Blue Zephyr (Brachyscome). Give them sun and let them do their job.