Giant Ironweed (Vernonia Gigantea) is a perennial herb in the Asteraceae family with easy care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 4-9. This plant is safe for cats and dogs.

Vernonia gigantea, or Giant Ironweed, is a tall, robust perennial wildflower native to North America, notable for its striking purple flowers and erect, unbranched stems.

Giant Ironweed

Giant Ironweed

Vernonia Gigantea

Vernonia gigantea, or Giant Ironweed, is a tall, robust perennial wildflower native to North America, notable for its striking purple flowers and erect, unbranched stems.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Easy
Water Needs
Moderate
Light
Full Sun, Partial Shade
Hardiness Zones
4-9

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:loamy, silty, clay
Indoor:No
Outdoor:Yes
Garden Use:specimen, pollinator support

Care Calendar

Monthly care tasks for Giant Ironweed

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Giant Ironweed
Giant Ironweed detail

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Taxonomy

Family:Asteraceae
Genus:Vernonia