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Description
sideremia altissima Vernonia altissimaEver seen a Yellow Swallowtail Butterfly on Tall Ironweed? The contrast is spectacular given the purple flowers and this late blooming perennial provides the perfect landing pad. Tall Ironweed can reach heights over 7 feet tall and blooms July through September. It prefers full sun and moderately damp soils conditions. Also known as Vernonia gigantea. How To Plant Tall Ironweed Seeds: Direct sow seeds into prepared soil in late fall once soil temps
Ever seen a Yellow Swallowtail Butterfly on Tall Ironweed? The contrast is spectacular given the purple flowers and this late blooming perennial provides the perfect landing pad.
Tall Ironweed can reach heights over 7 feet tall and blooms July through September. It prefers full sun and moderately damp soils conditions. Also known as Vernonia gigantea.
How To Plant Tall Ironweed Seeds:
Direct sow seeds into prepared soil in late fall once soil temps are below 50 degrees (usually mid to late November). Can also be planted in winter during natural freeze/thaw cycles and early spring. Plant shallow, no deeper than 1/8 to 1/4 inch deep and lightly rake to work seed in. Plant in full sun (at least 6 hours a day). Can take 3 growing seasons to fully establish.
Seed Info
Seed Envelopes contain approximately 0.02 ounces of seed and cover about 5 to 10 square feet.
Product Details
Flower Color: Purple
Height: 4 to 7 Feet
Light Requirements: Full Sun to Shade
Soil Hydrology: Mesic to Wet Soils
Bloom Time: July through September
Plant Type: Perennial
Stratification: Cold Moist (CM) 60 Days
Attracts: Bees, Butterflies
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