Swamp iris, also known as yellow flag iris, is one of the first plants to bloom in spring, producing striking yellow flowers that rise above its tall, sword-shaped leaves. These vibrant blooms typically continue throughout May, adding a splash of color to wetlands, shorelines, and other moist environments. While swamp iris is visually appealing and provides some habitat benefits, it spreads rapidly through both seeds and rhizomes, potentially outcompeting native vegetation. In some areas, management may be necessary to prevent excessive growth and maintain ecological balance.

⚠️  Invasive Species