Crop models are important tools for estimating crop yield and have been widely applied in risk assessment, field management, smart agriculture, and other aspects. This course will be in a workshop format, introducing the fundamental knowledge of crop models, and learning how to create process-based crop models (PBCM) based on the physiological mechanisms of crops, while understanding the application of existing PBCM in horticultural crops. Cropbox (https://github.com/cropbox/Cropbox.jl) is a crop modeling framework based on Julia language. In this course, students will have a walkthrough from simple to complex Cropbox models to learn how to solve research or practical cases they may encounter in the field.