The purpose of creating a Yellow Green DIY Gardening Tips Poster is to provide easy-to-follow instructions for individuals interested in gardening. The poster includes tips on how to plant, maintain, and care for various types of plants, as well as information on soil quality, watering techniques, and pest control. The overall goal is to help people create healthier and more beautiful gardens through a combination of practical advice and visual aids. The bright yellow and green color scheme is designed to attract attention and make the poster easy to read and understand.