Amethyst flower (Browallia hybrids)

If you love blue flowers, this annual is a must. Amethyst flower has star-shaped blooms of brilliant blue and sky blue, as well as violet and white; they nearly cover the 1- to 2-foot-tall plants.

Put them in hanging baskets or containers, then make them really happy by displaying them in a location that gets warm shade or filtered sunlight. Leaves are small, roundish, and green.

All zones.