I really like this idea of creating a colorful flower border along the hedges.
Like in this picture, I would start with tall, vibrant coleus at the back, with its striking leaves in shades of purple, red, and green. In front of the coleus, I’d plant a row of slightly shorter flowers, like zinnias, in a mix of bright yellows, oranges, and pinks. Moving forward, I’d add a layer of shorter cosmos, with their delicate, daisy-like blooms in shades of white, pink, and magenta. Finally, along the front edge of the border, I’d include a row of low-growing marigolds, with their cheerful, golden-yellow flowers.
This progressively shorter design would create a stunning visual effect, drawing the eye from the tall, eye-catching coleus at the back to the charming, compact marigolds at the front. The vibrant mix of colors and varied heights would add depth, texture, and interest to the flower border, making it a true showstopper.