Nutational traumatropism is a fascinating plant movement response where stems or tendrils adjust their growth direction after encountering physical obstacles. Outdoor plant boxes provide an excellent environment to observe this phenomenon. Here are the best plants to showcase nutational traumatropism:

1. Morning Glory (Ipomoea purpurea) – Known for its vigorous twining stems, morning glory exhibits clear nutational movements as it wraps around supports.

2. Sweet Pea (Lathyrus odoratus) – This climbing plant adjusts its tendrils dynamically when encountering barriers, making it perfect for experiments.

3. Bean Plants (Phaseolus vulgaris) – Their rapid growth and flexible stems allow easy observation of traumatropic responses.

4. Passionflower (Passiflora spp.) – With intricate tendrils, this plant demonstrates pronounced nutational adjustments.

5. Cucumber (Cucumis sativus) – Its climbing habit and sensitivity to touch make it ideal for studying traumatropism.

For best results, place these plants in outdoor boxes with trellises or obstacles. Regular monitoring will reveal how they adapt their growth patterns, offering valuable insights into plant behavior.