Cranebill geranium - available in blue, pink, rose and magenta. One of the most reliable and longest blooming plants for the garden, cranebill geraniums add a burst of color that starts in spring and lasts until first frost.
Serena Purple Angelonia angustifolia Bloom Season Early Summer - Late Summer Habit Compact Plant Height 10 in - 12 in Plant Width 12 in - 14 in Bloom Size in Light Requirements Full Sun Moist, well-drained Heat Tolerant
20 Colorful Plants for Shade Gardens 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.