Creating a visually striking contrast garden in outdoor plant boxes is all about selecting plants with varying textures, colors, and heights. Here are some top choices to achieve a dynamic and eye-catching display:

1. Coleus (Solenostemon scutellarioides) – With its vibrant, multicolored leaves, coleus adds instant contrast. Pair it with solid-green plants for a bold effect.

2. Heuchera (Coral Bells) – Available in shades like purple, lime, and bronze, heuchera provides rich foliage contrast.

3. Ornamental Grasses (e.g., Festuca glauca) – Their fine texture contrasts beautifully with broad-leafed plants like hostas.

4. Caladiums – These tropical plants feature heart-shaped leaves in striking pink, white, and green patterns.

5. Sweet Potato Vine (Ipomoea batatas) – Its trailing habit and deep purple or chartreuse leaves create a dramatic backdrop.

For the best results, combine plants with complementary colors (e.g., purple and yellow) or contrasting textures (smooth vs. spiky). Regular pruning and proper sunlight will keep your contrast garden thriving. Experiment with seasonal varieties to maintain year-round interest!