Nutational skotonasty refers to the rhythmic, non-directional movements of plants in response to environmental stimuli, such as light or gravity. These movements are particularly fascinating to observe in outdoor plant boxes, where plants have ample space to exhibit their natural behaviors. Here are some of the best plants for demonstrating nutational skotonasty:

1. Sunflowers (Helianthus annuus) – Known for their heliotropic movements, sunflowers track the sun during the day, showcasing a combination of nutation and phototropism.

2. Morning Glories (Ipomoea purpurea) – These climbers exhibit twisting growth patterns as they seek support, displaying clear nutational movements.

3. Bean Plants (Phaseolus vulgaris) – Their twining tendrils perform nutational sweeps to latch onto nearby structures.

4. Passionflowers (Passiflora spp.) – Their rapid, circular growth movements make them excellent for observing skotonastic behaviors.

5. Sweet Peas (Lathyrus odoratus) – These climbers show pronounced nutation as they grow upward, spiraling around supports.

For optimal observation, place these plants in well-lit outdoor plant boxes and provide trellises or stakes to encourage movement. Regular watering and balanced soil will ensure healthy growth and dynamic displays of nutational skotonasty. Whether for educational purposes or sheer fascination, these plants offer a captivating glimpse into the hidden motions of the botanical world.