Growing vegetables from seeds in outdoor plant boxes is a rewarding and space-efficient way to enjoy fresh produce. Whether you're a beginner or an experienced gardener, selecting the right plants is key to a successful harvest. Here are some of the best seed vegetables for outdoor plant boxes:

1. Lettuce – Fast-growing and versatile, lettuce thrives in containers. Varieties like romaine and butterhead are perfect for continuous harvesting.

2. Radishes – These root vegetables mature quickly (in about 3-4 weeks) and don’t require deep soil, making them ideal for shallow boxes.

3. Cherry Tomatoes – Compact bush varieties, such as 'Tiny Tim' or 'Patio Princess,' produce abundant fruit in sunny spots.

4. Spinach – A cool-season crop that grows well in partial shade, spinach is packed with nutrients and easy to maintain.

5. Bush Beans – Unlike pole beans, bush beans don’t need support and yield plenty of pods in small spaces.

6. Carrots – Choose shorter varieties like 'Paris Market' for shallower boxes, ensuring loose soil for straight roots.

7. Peppers – Dwarf pepper plants, such as 'Jalapeño Early,' add spice to your garden without taking up much room.

Tips for Success:

- Use well-draining soil and ensure your plant boxes receive at least 6 hours of sunlight daily.

- Water consistently but avoid overwatering to prevent root rot.

- Rotate crops if reusing boxes to maintain soil health.

With these plants, your outdoor plant boxes can become a productive and beautiful addition to your gardening space. Happy planting!