Bio-aesthetic planning is a novel technique that combines biological and aesthetic concepts in urban and environmental design to produce harmonious and sustainable living areas. This concept is inspired by nature, appreciating biological systems' inherent beauty and efficiency. Bio-aesthetic planning aims to create resilient and visually appealing landscapes that promote biodiversity, improve human well-being and minimize environmental issues by emulating nature's patterns, forms and processes. This chapter focuses on the fundamental principles of bio-aesthetic planning, suitability of ornamental plants and its applications in architectural design, landscape architecture and urban planning. The application of ornamental plants in bio-aesthetic planning serves as a way to design landscapes that are both visually appealing and environmentally sustainable. With their wide variety of hues, textures, and forms, ornamental plants present a special opportunity to incorporate the aesthetic beauty of nature into urban and environmental architecture. A Bio-aesthetic planner may create dynamic and resilient living environments that interact peacefully with urban planning by carefully choosing and placing ornamental plants according to ecological principles. The use of bio-aesthetic planning has the potential to renovate old cities and shape future cities in a way that coexists harmoniously with nature, benefiting both mankind and the environment.