Nutational seismonasty is a fascinating plant movement phenomenon where plants respond to external stimuli like touch or vibration. If you're looking to showcase this unique behavior in outdoor plant boxes, certain species are particularly effective. Here are the best plants to consider:

1. Mimosa pudica (Sensitive Plant) – Known for its rapid leaf-folding response to touch, this plant is a classic choice for demonstrating seismonasty.

2. Dionaea muscipula (Venus Flytrap) – While famous for trapping insects, its rapid leaf movements also exemplify seismonasty.

3. Codariocalyx motorius (Telegraph Plant) – This plant exhibits slow but visible leaf movements in response to light and touch.

4. Oxalis species (Shamrock Plant) – Some varieties close their leaves at night or when disturbed, showcasing nutational movement.

5. Biophytum sensitivum – A lesser-known but highly responsive plant that reacts to touch and vibration.

For optimal results, place these plants in well-draining soil and provide adequate sunlight. Observing their movements can be a rewarding experience for gardeners and plant enthusiasts alike. Experiment with different species to create a dynamic and interactive outdoor plant box display!