SEED ORDERS OVER $100 SHIP FREE!
Vernonia gigantea

Tall Ironweed

$3.00 - $120.00

Packet
$3.00
1/8 oz.
$3.50
1/4 oz.
$4.00
1/2 oz.
$5.20
1 oz.
$8.00
1 lb.
$120.00

Bare Root Plants
Out of Stock

3 Pack
Out of Stock

A member of the Sunflower family (Asteraceae), Tall Ironweed, also called Giant Ironweed, has showy bright magenta flowers that bloom in late summer to early fall.

This species is found most often on the eastern side of the Mississippi River valley. Tall Ironweed prefers wet soil conditions and full sun exposure. This plant spreads by rhizomes to form clumps. Because it can spread aggressively, Tall Ironweed is often categorized as a common pasture weed, but is endangered in New York. It will readily self-hybridize with other Vernonia spp. like Vernonia fasciculata (Common Ironweed) , Vernonia missurica (Missouri Ironweed), Vernonia baldwinii (Western Ironweed), and Vernonia noveboracensis (New York Ironweed) which can make plant ID difficult in the field.

Plant Ironweed to attract pollinators because it serves as a late-season nectar source. The caterpillars of some moths feed on Ironweed species, including Grammia parthenice (Parthenice Tiger Moth), Perigea xanthioides (Red Groundling), and Papaipema cerussata (Ironweed Borer Moth). The larvae of some insect feeders are known to form galls on the buds and flowerheads of Vernonia species.

Like milkweeds (Asclepias spp.) ironweeds (Vernonia spp.) are bitter to the taste, so deer and cattle often avoid consuming it.

Live Plant Shipping Table

Spring Fall Age/Size
Dormant Bare Roots April/May October
Potted 3-Packs May/June September 2.5" wide x 3.5" deep pots

Vernonia gigantea - Tall Ironweed

Map Key

Present in state
Present but introduced in county
Present and native in county; not rare
Not present in state
Present and native in county; rare
Species extirpated (historic)
State or county listed as noxious
Present in state; exotic

This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.

Be the first to ask a question.

Seed

Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.

Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.

Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.

To learn more, read our BLOG: How to Germinate Native Seeds

Dormant Bare Root Plants

We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.

Download: Installing Your Bare-Root Plants

Potted Plants

3-packs and trays of 32, 38, or 50 plants leave our Midwest greenhouses based on species readiness (being well-rooted for transit) and order date; Spring shipping is typically early May through June, and Fall shipping is mid-August through September. Potted 3-packs and trays of 38 plugs are started from seed in the winter so are typically 3-4 months old when they ship. Trays of 32/50 plugs are usually overwintered so are 1 year old. Plant tray cells are approximately 2” wide x 5” deep in the trays of 38 and 50, and 2.5" wide x 3.5" deep in the 3-packs and trays of 32; ideal for deep-rooted natives. Full-color tags and planting & care instructions are included with each order.

Download: Planting and Care of Potted Plants

*please note, we are a mail order nursery and have no retail facilities, but you may pick up your order if prior arrangements are made. Pick up orders are subject to *MN Sales Tax.

Shipping & Handling Charges
SEED$100.00 and under: $5.00
over $100.00: 5% of the total seed cost

*MN State Sales Tax of 7.375% is applied for orders shipping to Minnesota only. Shipping & Handling Charges are also subject to the sales tax.

Shipping Season

SEED, TOOLS and BOOKS are sent year-round. Most orders ship within a day or two upon receipt.

*We are unable to ship PLANTS outside the contiguous US or to California due to regulations.

Delivery

We ship using USPS, UPS and Spee Dee.

FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.

Details

Seeds/Packet
400
Seeds/Ounce
23,000
Germination Code
C(60)
Life Cycle
Perennial
Sun Exposure
Full, Partial
Soil Moisture
Medium-Wet, Medium
Height
5 feet
Bloom Time
August, September, October
Bloom Color
Purple
Advantages
Pollinator Favorite: butterflies, moths, bees, wasps, beetles
Bird Favorite: seeds, insects, fruit, nectar, nesting, perch
Deer Resistant
USDA Zones
5-9
Plant Spacing
2-3'
Catalog Code
VER10F