How can I effectively manage a garden with growing thistle to prevent it from spreading and overtaking other plants?

To effectively manage a garden with growing thistle and prevent it from spreading and overtaking other plants, you can regularly pull out thistle plants by hand, making sure to remove the entire root system. You can also use mulch to suppress thistle growth and prevent it from spreading seeds. Additionally, consider using herbicides specifically designed to target thistle while being careful not to harm other plants. Regular monitoring and prompt action are key to controlling thistle in your garden.