Growing succulents in an outdoor plant box in cold climates is possible with the right approach. While most succulents thrive in warm, dry conditions, certain hardy varieties can withstand colder temperatures. Key factors include selecting frost-resistant species like Sempervivum (Hens and Chicks) or Sedum, ensuring proper drainage in the plant box, and providing winter protection such as mulch or frost cloth.

To succeed, choose a sunny location and use a well-draining soil mix to prevent root rot. During extreme cold, move the plant box to a sheltered area or insulate it. Water sparingly in winter, as excess moisture can freeze and damage the plants. With careful planning, you can enjoy a vibrant outdoor succulent display even in chilly climates.

Remember, not all succulents are cold-hardy, so research your specific varieties before planting. By adapting your care routine to seasonal changes, your outdoor succulent garden can thrive year-round.