Since the garden project is located in the open space, greening plants is an important part of the garden landscape. For Xiongan New Area, this paper makes clear provisions in the implementation of BIM technology for landscaping projects, as well as fineness requirements for geometric information and attributes information of greening plant models from BIM3 to BIM5 stages. The huge number of green plants brings great challenges to the technical implementation of BIM engineers. It can be determined that manual placement and adjustment can no longer meet the normal model creation schedule, and even affect the delivery of the completed materials of the whole garden project. Based on Dynamo open source visual programming software, this paper uses visual programming scripts to describe three methods of making landscaping plants, while ensuring accurate positioning and efficient model creation. The research method in this paper may be extended to similar applications.