Since they’re both invasive, they can quickly take over a garden, leading to crowding, reduced space for root development, and diminished growth and yield for both plants.
The strong odor of garlic can repel certain pests like flea beetles and spider mites, while mint attracts them, thereby reducing the garlic’s capacity to repel pests effectively.
If you want both in your garden, plant them in different areas, use physical barriers like pots or containers to separate them, and place them with their companion plants.