Thigmonasty, the fascinating movement of plants in response to touch, can be a captivating feature in outdoor plant boxes. Here are the best plants to showcase this unique phenomenon:

1. Mimosa pudica (Sensitive Plant): The classic choice, its leaves fold inward when touched, making it a star of thigmonasty displays.

2. Dionaea muscipula (Venus Flytrap): While known for trapping insects, its rapid leaf closure also demonstrates thigmonasty.

3. Oxalis species (Wood Sorrel): Some varieties exhibit leaf folding when disturbed, adding delicate movement to plant boxes.

4. Codariocalyx motorius (Telegraph Plant): Its smaller leaflets move in response to touch or vibration, creating subtle but intriguing motion.

For optimal results, place these plants in sunny spots with well-draining soil. Their interactive nature makes them perfect for educational gardens or spaces where visitors can engage with nature. Regular watering and occasional fertilization will keep them thriving and responsive.

Pairing these with non-responsive plants creates a dynamic contrast, highlighting the unique behaviors of thigmonastic species. Whether for science education or sheer curiosity, these plants transform outdoor plant boxes into living exhibits of botanical wonder.