Enjoy colorful flowers in the summer with easy-to-grow, often fragrant, geraniums. These popular flowers are a favorite for planting in patio containers and window boxes. They look great in containers by themselves or paired with other plants. One of the most popular geraniums to grow on decks and patios is the Mosquito Shoo Geranium, which is said to repel mosquitoes for about 10 square feet. It releases the pleasant oil of citronella aroma. Many gardeners plant several of these geraniums in containers where people gather in the summer months. When selecting geraniums to buy online, take note of their light requirements, height, bloom time and hardiness zone.