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ALASKA HAWAII MIDWEST NORTHEAST PACIFIC NORTHWEST SOUTHEAST SOUTHWEST WEST Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone 6 Zone 7 Zone 8 Zone 9 Zone 10
What is this To help gardeners understand which plants will grow well for them, the entire USA has been segmented into ‘Plant Hardiness Zones’.

Vernonia gigantea

 

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Shipping:
Shipping begins in September based on ground temperatures, coldest zones first. Learn More…

Giant ironweed blooms in the later summer and early fall, adding grace to the very tip-top of the garden. If you do much driving in the country, you’ve seen the tall plants with bright purple aster-like flowers blooming along the roadsides. Plants provide an important late-season source of food for butterflies. Ironweed thrives in full sun and moist soils in zones 5-8. (Veronia)

Zones 5 - 8
Advantages
Deer Resistant
Deer Resistant
Attract Butterflies
Attract Butterflies
Attract Birds
Attract Birds
Bee Friendly
Bee Friendly
Native
Native
Multiplies / Naturalizes
Multiplies / Naturalizes
Light Requirements
Full Sun
Full Sun
Half Sun / Half Shade
Half Sun / Half Shade
Mature Plant Size 72-96 inches tall (6-8 feet), 36-72' wide
Bloom Time Summer to fall
Size Bag of 3
SKU AFLGM03

Plant Information

6-8 feet tall and 3-6 feet wide, Vernonia gigantea (Giant Ironweed) can provide fall fireworks in the garden or can be pruned back in mid-summer to result in a more manageable maximum height. It’s most effective for pollinator benefit and garden color when planted in multiples of three or more plants. Site plants in full sun in moist soil. Giant ironweed can tolerate wet feet for extended periods of time. They will self-sow, so deadhead when flowers fade to keep the garden tidy. Relatively easy to grow, and not prone to pest and disease problems. Pairs well with other prairie wildflowers and grasses.

SKU AFLGM03
Common Name Giant Ironweed
Botanical Name Vernonia gigantea
Zones 5, 6, 7, 8
Light Requirements Full Sun, Half Sun / Half Shade
Flower Color Pink, Purple
Mature Height 72-96 inches tall (6-8 feet)
Estimated Mature Spread 36-72' wide
Bloom Time Summer to fall
Planting Depth Plant so that the top of the root is 1" below the soil line.
Ships As Bare Root
Foliage Color Green
Foliage Lance shaped leaves up to 10" long.
Native Yes
Planting Time Fall
Soil Type Loamy Soil, Moist/Wet Soil
Soil Moisture Average, Moist/Wet
Advantages Deer Resistant, Attract Butterflies, Attract Birds, Bee Friendly, Native, Multiplies / Naturalizes
Prohibited In Kentucky
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada No

Shipping

Shipping begins in September based on ground temperatures, coldest zones first.

As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Fall bulbs are shipped at the proper planting time for your hardiness zone. Perennial orders may arrive separately from bulbs and seeds. If your order requires more than one shipment, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you need express shipping or have any questions, please call Customer Service toll-free at (877) 309-7333 or contact us by email.

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Q & A

Plant With These:

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

Find Your Planting Zone:

Enter your Zip Code to find your USDA Planting Zone

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