Abstract:With the advancement of the Carbon Peaking and Carbon Neutrality Targets and ecological civilization construction, the curriculum reform in landscape architecture education increasingly emphasizes integrating ecological and aesthetic education into teaching. Taking the course Green Space System Planning and Design as an example, this paper explores a practical teaching model that introduces seasonal observation of plant colors, aiming to correct the misconception that 'subtropical plants lack color diversity' and to enhance students' comprehensive ability to express ecological processes and landscape aesthetics in tree species planning and green space classification design. By designing practical activities such as continuous observation cycles, field photography, quantitative color data analysis, and classroom presentations, students systematically recorded the color variation patterns of urban greening plants in subtropical evergreen broadleaf zones across different seasons and physiological stages, followed by group presentations and discussions. The results show that students recognized significant temporal differences not only among different tree species but also within the same species, even in mixed evergreen forest areas. Furthermore, the observation practice effectively stimulated students' interest and ecological awareness. The teaching practice demonstrates that integrating seasonal plant color observation with theoretical instruction and case studies strengthens students' understanding of green space system structure, ecological functions, and landscape expression, fosters ecological thinking and aesthetic competence, and provides a foundation for students to make more regionally appropriate tree species selections and designs in green space system planning. This study offers a feasible approach to curriculum design for ecological aesthetic education in landscape architecture and carries practical significance.