Marsh marigolds are perennial plants that thrive in wet, marshy areas, often found near streams and ponds. They are known for their bright yellow flowers, which bloom in early spring, typically from March to May. The leaves are large, heart-shaped, and can grow up to a foot wide, providing a lush green backdrop to the vibrant blooms. These plants belong to the Caltha genus and are native to North America and parts of Europe. Marsh marigolds prefer full sun to partial shade and can tolerate a variety of soil types, making them a popular choice for water gardens and natural landscaping.