South-facing outdoor plant boxes receive abundant sunlight, making them ideal for heat-tolerant and sun-loving plants. Here are the best options to thrive in these conditions:

1. Succulents (e.g., Sedum, Echeveria) – Drought-resistant and low-maintenance, perfect for full sun.

2. Lavender – Loves sunlight and adds fragrance with its purple blooms.

3. Geraniums – Vibrant flowers that flourish in warm, sunny spots.

4. Rosemary – A hardy herb that thrives in heat and enhances culinary dishes.

5. Marigolds – Bright, cheerful flowers that repel pests and love direct sun.

For added variety, consider ornamental grasses like Blue Fescue or trailing plants like Portulaca. Ensure proper drainage and occasional watering to keep plants healthy. With these selections, your south-facing plant boxes will stay lush and colorful all season!