Details30-60" tall x 18" wide (seed propagated). Western Ironweed is a durable, easy-to-grow wildflower from the country's midsection that adds invaluable late summer color to the garden. It is also a butterfly magnet as its showy clusters of vivid purple flowers are a favorite nectar source. Plant Ironweed in humus-rich soil in full sun at the back of a perennial garden or naturalize in a meadow or prairie. Stunning when planted with Goldenrod (Solidago).
|Common Name||Western Ironweed|
|Botanical Name||Vernonia baldwini|
|Zones||5, 6, 7, 8, 9|
|Light Requirements||Full Sun, Morning Sun & Afternoon Shade|
|Mature Height||30-60" tall|
|Mature Spread||18" wide|
|Bloom Time||Late summer to early fall|
|Ships As||Potted Plant|
|Planting Time||Spring / Summer|
|Soil Moisture||Drought Resistant / Waterwise|
|Amount of Rain||10 to 20", 20 to 30", 30 to 40" (with care)|
|Advantages||Deer Resistant, Attract Butterflies, Rabbit Resistant|
|Ideal Region||Anywhere In The US|
|Neonicotinoid-Free||Yes - Learn More|
|Ships to Hawaii, Alaska & Canada||No|
- Plant in most soil types including clay.
- Best positioned in a full sun to partial shade locations.
- Mulch with common mulch materials in dry Western climates. Leave un-mulched in moister Eastern climates.
- Water regularly the first growing season to establish the plant. Most species and varieties like moderately moist to wet soils and should receive regular irrigation in arid climates. Rainfall is generally sufficient in moist Eastern climates.
- Vernonia lindheimeri v. leucophylla is xeric and should be only given occasional deep watering when conditions are dry.
- Deadhead the flowers when blooming is finished. Many species from the Midwest and Eastern US will re-seed aggressively in moist soils. Deadheading is helpful to reduce volunteer seedlings.
- Fertilize lightly in the fall with Yum Yum Mix. Special comments:
- Leave standing of the winter and cut back hard in early to mid-spring.
- Tall species may need staking unless stem tips are pinched back in late spring/early summer to thicken up the plant's stem structure.
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first. Most plant orders will arrive within 3-4 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.
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Q & A
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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).
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