Creeping Jenny is generally easy to grow, but it can develop leaf spots or rust, particularly when growing conditions encourage fungal problems. Slugs may also damage its leaves. Check the plant regularly, remove badly affected foliage, and avoid overcrowding to improve airflow. The biggest concern is often its vigorous spreading habit. Its stems can root where they touch the soil, allowing the plant to form dense mats and compete with other plants. Growing it in pots, trimming runners, and removing unwanted stems can help keep it under control.