Vernonia lettermanii Iron Butterfly

Iron Butterfly Ironweed

Iron Butterfly is a showy selection of Letterman's Ironweed, a native wildflower from Arkansas. This densely branched perennial has bright green, finely textured foliage and bright violet-purple flowers in late summer. Attracts butterflies and bees galore. Drought resistant/drought tolerant plant (xeric).
Zones4 - 9
Advantages
Attract Butterflies
Bee Friendly
Deer Resistant
Rabbit Resistant
Native
Multiplies / Naturalizes
Light Requirements
Full Sun
Annual Rainfall
10 to 20"
20 to 30"
30 to 40" (with care)
Mature Height24-36" tall
Mature Spread18-24" wide
Bloom TimeSummer
ShippingNow shipping to zones 5-10.
Other zones shipping soon.
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SizePlant - 5" Pot
SKUHC014744

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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SKU
HC014744

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Details
24-36" x 18-24" wide. Here is a distinctive, new-to-cultivation native perennial that provides both flower color and foliar texture in the garden. Selected as a more compact version of a little known wildflower species from Arkansas, Iron Butterfly is a densely branched perennial with finely textured, almost thread-like foliage and bright violet-purple flowers capping the stems in late summer-early fall. A rich source of natural nectar, the plant is extremely attractive to butterflies.
More Information
SKUHC014744
Item Package Size
Plant - 5" Pot
Common Name
Iron Butterfly Ironweed
Botanical Name
Vernonia lettermanii Iron Butterfly
Zones
4, 5, 6, 7, 8, 9
Light Requirements
Full Sun
Flower Color
Purple
Mature Height
24-36" tall
Mature Spread
18-24" wide
Bloom Time
Summer
Ships As
Potted Plant
Soil Type
Low Fertility Soil, Well-Drained Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30", 30 to 40" (with care)
Advantages
Attract Butterflies, Bee Friendly, Deer Resistant, Rabbit Resistant, Native, Multiplies / Naturalizes
Ideal Region
Anywhere In The US
Planting Time
Spring / Summer, Fall
Item Unit Of Measure
Plant
Ships To Canada
No
Planting Guides
Vernonia (Ironweed) is big genus of New World wildflowers, with most species native to North America. Members of the Aster family, they are important late season sources of nectar for butterflies.

Preferred growing conditions:
  • 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.
Shipping
ZoneShipping Status
Zone 2Shipping begins the week of May 20th, 2019
Zone 3Shipping begins the week of May 20th, 2019
Zone 4Shipping begins the week of May 20th, 2019
Zone 5Now Shipping
Zone 6Now Shipping
Zone 7Now Shipping
Zone 8Now Shipping
Zone 9Now Shipping
Zone 10Now Shipping
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