This paper presents a comprehensive Holographic Garden Landscape Simulation System (HGLSS) that combines L-system-based plant generation, binocular stereo vision reconstruction, and fractal modeling in response to growing demands for ecological sustainability and immersive design technologies. The majority of 3D garden software available today lacks immersive, real-time visual feedback, and traditional 2D design techniques are restricted in their ability to convey spatial reality and interactivity. We suggest a multi-module system architecture that consists of a dynamic resource library and a model scene design engine in order to overcome these difficulties. The system uses particle systems, and stochastic fractal algorithms to create natural features like trees, clouds, water, and terrain. It also uses binocular stereo vision to recreate the terrain. Realtime rendering using the OSG and Unity3D improves simulation realism. Hierarchical analysis-based performance evaluation identifies five important metrics: usability, extensibility, functionality, authenticity, and interaction. Of these, interactivity has the highest weight (0.583). The system’s ability to accomplish 1:1 architectural-terrain restoration and high-fidelity modeling of intricate elements like spruce trees and stone formations is demonstrated by its practical deployment in a recently created ecological area. The system’s ability to increase design accuracy, artistic realism, and user happiness is confirmed by the evaluation’s mean design quality score of 94.7 across ten technical and perceptual parameters.