Giant Vernonia

Giant Ironweed · Asteraceae · Perennial

Fournisseur Akène
Type de produit Seeds
Disponibilité En stock
Quantité disponible 1
Nombre de semences par sachet Minimum 100 seeds
$4.99

Giant ironweed is a spectacular perennial that instantly transforms the garden with its majestic stature, intense bloom, and remarkable ecological value. Standing tall above other plants, it creates a strong architectural presence while maintaining a natural elegance thanks to its sturdy stems and clusters of deep purple flowers that seem to float at the end of the season. In pollinator gardens, naturalist beds, or large-scale plantings, it acts as a true beacon for bees, butterflies, and a host of useful insects attracted by its abundant nectar. Its dark green lance-shaped foliage creates a striking contrast with the richness of its bloom, giving it a powerful visual impact without losing its wild character. Well-suited to average to moist soils and sunny exposures, it thrives particularly where it can reach its full height and give the landscape a lush and vibrant look. In autumn, its seeds extend its appeal by also attracting certain birds, further adding to its nourishing role in the ecosystem. Its vigor and root system also make it an excellent candidate for soil stabilization and ecological restoration projects. Growing giant ironweed means offering the garden an imposing, vibrant plant that is deeply beneficial to biodiversity.

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Growing conditions

Watering
Regular
Exposure
Sun to partial shade
Germination temperature
18 to 22°C (64 to 72°F)
Germination (days)
15 to 20 days

Growth & dimensions

Spread
30 to 48 in. (75 to 120 cm)
Height
2 to 3 m (6.5 to 10 ft)
Sowing depth
2 mm

Flowering & harvest

Flowering
July to August
Sowing period
Autumn or spring after stratification
Harvest
August to October
Use
Pollinator garden, naturalization, soil stabilization, container gardening
Companion plants
Joe Pye weed, flat-topped aster, sneezeweed, blue vervain
Incompatible plants
lavender, cotton lavender, blanket flower, sedum