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Oct 20, 2023 · Standing 4 to 6 feet tall at maturity, ironweed boasts a big garden presence when it begins blooming in late summer. That's because clusters of bright purple flowers decorate its tall stems for 6 weeks or more at the end of the growing season.
Jan 20, 2024 · When grown under optimal conditions, V. gigantea can reach 10 feet tall. This species is hardy in Zones 5 to 9 and is moderately resistant to powdery mildew. ‘Jonesboro Giant’ is one of the largest cultivars on the market, reaching a mature height of almost 12 feet tall, with rigid, upright stems.
Common Name (s): Giant ironweed is a native herbaceous perennial wildflower in the Asteraceae or daisy family. This plant has a tall narrow habit that appears in the spring. The plant usually grows from 3 to 5 feet tall, but it has been known to grow to a height of 12 feet.
As a tall, narrow plant, Giant Ironweed is suited for the back of the border or tight spaces and grows well in the native meadow garden and along ponds and streams. Grows up to 5-8 ft. tall (150-240 cm) and 3-6 ft. wide (90-180 cm).
Size: Sizes vary among species, some reaching up to 8 feet tall (240 cm), while others are more compact and suitable for smaller gardens. Flowers: The flowers of Ironweed are its most notable feature, with dense clusters of tiny, fluffy, purple to magenta florets that typically bloom in late summer to early fall.
As a tall, narrow plant, Tall Ironweed is suited for the back of the border or tight spaces and grows well in the native meadow garden. It is a good choice for rock gardens, butterfly gardens or dry sandy perennial borders where little else will grow. Grows up to 2-4 ft. tall (60-120 cm) and 1-2 ft. wide (30-60 cm).
This ironweed is 1 to 3 meters (3.3 to 9.8 feet) tall. The stem is rigid mostly smooth, sometimes with a few silky white hairs near the leaf bases. Leaves are alternate, 10 to 30 centimeters (4 to 12 inches) long, and 2 to 4 centimeters (0.75 to 1.5 inches) wide.
