Phototropism, the growth response of plants to light, is a fascinating phenomenon easily observed in outdoor plant boxes. For gardeners and educators, selecting the right plants can make this natural process visually striking. Here are the top plants to showcase phototropism effectively:

1. Sunflowers (Helianthus annuus) – Known for their dramatic sun-tracking movement, sunflowers are ideal for phototropism demonstrations. Their tall stems and large leaves respond vividly to sunlight.

2. Morning Glories (Ipomoea purpurea) – These fast-growing vines twist and turn toward light sources, making them perfect for observing directional growth.

3. Beans (Phaseolus vulgaris) – Bean plants exhibit strong phototropic responses, with young shoots bending noticeably toward light.

4. Marigolds (Tagetes spp.) – Compact and vibrant, marigolds adjust their foliage to maximize light exposure, ideal for small plant boxes.

5. Zinnias (Zinnia elegans) – With bright blooms and sturdy stems, zinnias show clear phototropic movements, especially in sunny locations.

For best results, place your plant box in a spot with varying sunlight angles and rotate it occasionally to observe the plants’ adaptive growth. This simple experiment not only highlights phototropism but also enhances your gardening experience!