Growing edible leaves in outdoor plant boxes is a fantastic way to enjoy fresh, homegrown greens. Whether you're a beginner or an experienced gardener, certain plants thrive in containers and provide delicious, nutrient-rich leaves. Here are some of the best options:

1. Spinach: A cold-hardy favorite, spinach grows quickly and is packed with vitamins. It’s perfect for early spring or fall planting.

2. Kale: Known for its resilience, kale can handle cooler temperatures and even light frosts, making it ideal for outdoor boxes.

3. Swiss Chard: With vibrant stems and tender leaves, Swiss chard is both ornamental and edible, thriving in partial shade.

4. Lettuce: Fast-growing and available in many varieties, lettuce is a must-have for any edible garden.

5. Arugula: This peppery green adds a zesty kick to salads and grows well in compact spaces.

For best results, ensure your plant boxes have good drainage and receive at least 4-6 hours of sunlight daily. Regular watering and occasional fertilizing will keep your leafy greens flourishing. Happy gardening!