My garden doesn’t have many fall native wildflowers (yet). One I do like very much, though, is hollow Joe Pye weed (Eutrochium fistulosum).
Native to eastern North America, Eutrochium fistulosum forms a massive clump, growing 5-8 feet tall and 4 feet wide in the moist soils it likes. Mine is a bit on the drier side, and so grows correspondingly shorter, topping out at around 6 feet high and 3 feet wide. During rainy spells in summer, I can practically watch it grow.
Butterflies and bees love the flowers, which are rich in nectar.
My plant suffered a setback from last year’s weather, I think; it’s half the size it was last year. Or perhaps it’s time to dig and divide. I’m keen to keep it going because it attracts so much wildlife. And the seed heads look beautiful all winter, especially under ice.
Ice on Joe Pye weed, Eutrochium fistulosum
Season: midsummer through fall; winter interest
Height: 5-8 ft.
Flower Color: Rosy purple.
Hardiness: USDA Hardiness Zone 4-8
Foliage: Lime green, lightly serrated. Red stems.
Flower: Loose, rosy purple inflorescences.
Site: Prefers moist sites but will cope with average to dry soils.
Propagation: Division spring or fall.
Exposure: Full sun to partial shade
Soil: Moist and well-drained to wet.
Origin: Eastern North America
Life Cycle: Perennial
Wildflower Wednesday is a celebration of wildflowers from all over the world. It’s hosted by Gail and Clay and Limestone on the fourth Wednesday of each month.
MissingHenryMitchell 
Love the lacy texture of umbrel-flowerhead plants!
One of my very favorite plants. Give it a little time and it will find new spots to grow. I left a few clumps unchecked and it is blooming everywhere but I love it. It is even now blooming in some wild areas which is great since it is native and the wild areas have more weeds (non-natives) than native plants.
I am wanting to grow Joe Pye weed but seedlings I started are very slow getting going. Hopefully someday it will look like yours!
I love Joe Pye weed, and you’re so right, the butterflies and bees love it! Mine, though, has never developed the reddish stems I usually see on Joes; I’ve often wondered if the natives are a little less colorful than some of the ones sold in nurseries. I added a ‘Little Joe’ last year that is much more colorful. Happy WW!