Natural Yard & Kennel Spray is made with natural cinnamon oil, clove oil and cedar wood oil which kills fleas & ticks by contact and fully effective up to 7 days. This product is also effective on black flies & mosquitoes. Natural Yard & Kennel Spray™ can be used around all ages of animals and it is great for use one yards, kennels, pool/patio areas, outside surfaces, trees, shrubs and more! This product is not known to be harmful to any grass, trees, shrubs or flowers.