Ironweed Giant

Giant Ironweed is a tall, colourful perennial native to Ontario. In late summer, it produces an abundance of vivid purple flowers at the tops of sturdy stems, creating a strong display of colour while providing an important nectar source for bees, butterflies, and other late-season pollinators. Its impressive height makes it especially useful at the back of large perennial, meadow, or native gardens.

Giant Ironweed grows best in full sun with moist, well-drained soil and is particularly well suited to areas near streams, ponds, and other bodies of water. It can grow very tall, so cutting it back by about one-third in July can help keep the plant shorter, fuller, and less prone to flopping. Remove spent flowers before they go to seed if you want to prevent unwanted spread.