A fertilizer and insecticide capsule attaching to an in-ground sprinkler system allowing lawn and garden chemicals to be dispensed simultaneously to a lawn or garden while watering it. Lawn and garden chemicals in tablet or liquid form can be used interchangeably with ease. This method of chemically treating a lawn or garden greatly reduces or eliminates chemical exposure to a user while dispensing chemicals onto a lawn or garden. The present invention is easy to install and use, and saves a user time by combining process of watering a lawn or garden with process of chemically treating a lawn or garden.