Delight the senses—and possibly even repel mosquitoes—with geraniums. Some geraniums release a pleasant odor of oil of citronella or a lemon scent that is believed to repel mosquitoes. Grow geraniums in containers and sit them in a sunny area on your patio or deck where visitors can admire their beauty and pleasant scent. While humans find them delightful, deer tend to pass them by. Many geraniums are not winter hardy and can be brought indoors and grown as houseplantd during the winter months. When shopping for geraniums for container planting, note the variety's hardiness zone. Other considerations are mature height and spread, bloom time and flower color.