Wetlands growth is a term used to describe the expansion of wetlands, which are areas of land that are saturated with water. Wetlands growth is often caused by the presence of reeds, cattails, and sedges, which are all types of vegetation that thrive in wet environments. Reeds are tall, slender plants with hollow stems, cattails are tall, grass-like plants with long, cylindrical seed heads, and sedges are grass-like plants with triangular stems. All three of these plants are important components of wetland ecosystems, as they provide food and shelter for wildlife and help to maintain water levels.