Managing monorepos in Rust can simplify dependency management, ensure consistent versioning, promote code reuse, and enhance collaboration among developers. A monorepo consolidates all code for an organization or project into a single repository, which is particularly advantageous for Rust projects as it allows for unified management of code dependencies and simplifies cross-project testing. The article outlines how to set up a Rust monorepo using Cargo, Rust's package manager, which facilitates the management of multiple packages within one repository. Additionally, it discusses the use of Earthly, a build tool that aids in containerizing packages and running tests efficiently, which is beneficial for larger projects. The article emphasizes the importance of choosing the right tools and approach to maximize the benefits of monorepos, highlighting Cargo workspaces and Earthly as effective solutions for Rust projects.