Herbaceous stems are soft, green stems found in many plants, such as flowers and vegetables. Unlike woody stems, they do not become hard or rigid. These stems are typically flexible and can grow quickly, allowing the plant to thrive in various environments. Herbaceous stems often contain chlorophyll, which helps in photosynthesis, the process by which plants convert sunlight into energy. They usually die back in the winter but can regrow in the spring, making them an essential part of many garden ecosystems.