Intensive planting in outdoor plant boxes is a smart way to maximize limited space while creating a lush, productive garden. This method involves growing plants closely together, reducing weeds and conserving moisture. Here are some of the best plants for intensive planting in outdoor plant boxes:

1. Lettuce and Leafy Greens: Fast-growing and compact, varieties like spinach, arugula, and kale thrive in tight spaces.

2. Herbs: Basil, parsley, cilantro, and thyme are perfect for interplanting and add flavor to your dishes.

3. Radishes and Carrots: These root vegetables grow well in shallow boxes and can be harvested early.

4. Strawberries: Compact and prolific, strawberries are ideal for vertical or tiered plant boxes.

5. Dwarf Tomatoes and Peppers: Choose bush varieties for small spaces, ensuring they get enough sunlight.

Tips for Success:

- Use nutrient-rich soil to support dense planting.

- Water consistently, as closely spaced plants compete for moisture.

- Rotate crops to prevent soil depletion.

By selecting the right plants and maintaining proper care, your outdoor plant boxes can yield a bountiful harvest while saving space. Happy gardening!