Keeping weeds out of your outdoor plant box is essential for healthy plant growth. Here are some effective methods to prevent weeds naturally:

1. Use Organic Mulch: Spread a layer of organic mulch like straw, wood chips, or leaves around your plants. This blocks sunlight, preventing weed seeds from germinating.

2. Plant Densely: Space your plants closely to leave little room for weeds to grow. The shade from mature plants also discourages weed growth.

3. Apply Landscape Fabric: Place a permeable landscape fabric beneath the soil to stop weeds while allowing water and nutrients to reach plant roots.

4. Hand-Pull Weeds Early: Remove weeds as soon as they appear to prevent them from spreading seeds.

5. Use Vinegar Solution: Spray a mix of vinegar and water on young weeds for a chemical-free weed killer.

By following these tips, you can maintain a weed-free outdoor plant box and ensure your plants thrive.