Creating a robotics-themed outdoor plant box is a unique way to blend technology and nature. The key is to select plants that evoke a futuristic or mechanical vibe while being easy to care for. Here are the top choices:

1. Silver Dust (Senecio cineraria) – Its metallic silver foliage mimics the sleek look of robotics, adding a futuristic touch.

2. Snake Plant (Sansevieria) – With its rigid, upright leaves, it resembles industrial design and thrives with minimal care.

3. Aluminum Plant (Pilea cadierei) – The shiny, patterned leaves look almost machine-made, perfect for a tech-themed garden.

4. Steel Grass (Lomandra longifolia) – Its tough, blade-like foliage echoes robotic precision and durability.

5. Echeveria 'Metallic Blue' – This succulent’s blue-gray hue gives off a sci-fi aesthetic while being drought-resistant.

Pair these plants with geometric planters or LED lighting to enhance the robotics theme. Low-maintenance and visually striking, they’re ideal for tech enthusiasts and gardeners alike.