The application of digital and information technology in landscape architecture is becoming more and more widespread. The virtual simulation of plant morphology and configuration design has always been a topic of concern. Firstly, this paper introduces the application characteristics and current virtual reality technology (VR) problems in plant landscape design. Secondly, based on the Mars platform, through the methods of qualitative analysis and quantitative strategy, through verification of reduction degree, simulation of growth parameters, and simulation of dynamic change of flower border plant material, this paper discusses the application of virtual reality technology in the design of flower border. Combined with the flower design, this paper tries to provide an innovative research perspective and ideas for applying virtual reality technology in planting design theory research and design practice.