Best Flowers for Spring Window Boxes
Feb 12, 2013· Fragrant and vibrant, sweet peas grow best in cool conditions, and bush types are very suitable for window boxes. For warm climates, you have abundant choices. Petunias, nasturtiums, marigolds and impatiens thrive in window boxes. In hot zones, verbenas bloom in mid-spring, flowering on bushy plants in purple, pink, white and red flowers.