The Ohio State University at Marion

August Blooms

Arrow Leaved Aster

Aster sagittifolius 

Blooms August - October

You may find this plant drooping over a bit due to its heavy flowers. At two-to-three feet tall this plant has flowers that start as cream colored and change to a light purple as they mature.  

Black Eyed Susan

Rudbeckia hirta 

Blooms August - September

Black-eyed Susan is covered with brilliant yellow flowers with jet-black centers for up to three months in summer and fall, often right up to the first hard frost. Grows two-to-five feet tall. This plant is a favorite of many home gardeners. The species is a short-lived perennial, often living only two or three years. It produces copious amounts of seed and quickly re-seeds itself

Bottle Gentian

Gentiana andrewsii

Blooms August - September

The deep bluish purple flowers of Bottle Gentian never fully open, giving them their characteristic bottle-like appearance. Its shape prevents all but the largest insects from entering. Bumblebees force themselves inside by pushing the petals apart. One of the last plants to bloom in fall, it grows one-to-two feet tall.

Calico Aster

Aster lateriflorus 

Blooms August - October 

Dense Blazingstar

Liatris spicata    

Blooms August - September 

Dense Blazing Star features bold purple flower clusters on tall spikes. The flowers are very attractive to butterflies and moths. The fluffy flowers bloom from top to bottom on the spikes which can reach six feet tall. Blooms burst forth in July and last into September.  

Frost Aster

Aster pilosus    

Blooms August - October 

The unique flowers of this Aster brighten up the prairie late in the season. A myriad of white blooms with maroon and yellow centers cover the two-to-three foot tall stems in autumn. It flowers for an extended period, often right up to the first frost. 

Grass Leaved Goldenrod

Solidago graminifolia

Blooms August - October 

Grass Leaved Goldenrod grows up to three-and-a-half feet tall with clusters of yellow flowers. The blooms appear late summer to early fall, lasting about a month. This goldenrod has more slender leaves than the other goldenrods, hence the name.  

Great Lobelia

Lobelia siphilitica

Blooms August - September 

Great Blue Lobelia is a tall showy plant with many bright blue to purple flowers which attract hummingbirds for pollination. This plant can grow from one-to-four feet feet. Blooms appear in July.  

Large Blazingstar

Liatris scariosa

Blooms August - September 

Large Blazing Star can reach up to five feet tall and features purple rounded flower heads which line tall spikes. The flower clusters bloom from top to bottom on the spike during August and September.  

New England Aster

Aster novae-angliae

Blooms August - October 

Tall and majestic, New England Aster rules the prairie in autumn. The deep blue to purple flowers are highlights of the late season wildflower garden. This aster blooms late into the fall, well after the first frost. It serves as a critical late season nectar source for butterflies, especially for Monarchs, as they stock up for their long migration to Mexico. 

Prairie Dock

Silphium terebinthinaceum  

Blooms August - October 

This plant has a vase-like rosette of large basal leaves that are spade-shaped (cordate). Each leaf has a thick sandpapery texture, particularly on the underside. The stalk is green or red, and largely hairless. The upper part of the stalk divides gracefully into a panicle of yellow composite flowers and spherical green buds. 

Round Headed Bush Clover

Lespedeza capitata

Blooms August - September  

At a distance Round-Headed Bush Clover may seem uninteresting, as its small white flowers barely protrude from the plant. But at a closer glance, you can find the flowers and notice the hint of purple near their centers. The blooms appear in late summer and last about a month. The plant serves as a food source for many mammals  


Helenium autumnale

Blooms August - October 

Sneezeweed has unique daisy-like flowers with distinctive tooth-like indentations at the ends of their petals. It produces many bright yellow blooms, it puts on quite a show in August and September. Grows four-to-five feet tall. The dried flowers heads were used by Native Americans to cure head colds.

Stiff Goldenrod

Solidago rigida

Blooms August - September 

The brilliant yellow flowers of Stiff Goldenrod appear in August and September. The three-to-five foot tall stems make excellent perches for birds and the seeds are an important late season food source. Its stem and leaves are hairy and its basal leaves are stiff and stand erect, hence its common name. The plant's round fleshy leaves help to differentiate it from other species of goldenrod, making this goldenrod easy to identify.  


Eupatorium altissimum 

Blooms August - October 

Thoroughwort grows three-to-five feet tall with white hairs covering the stem. The small flowers form a large cluster which blooms white July through September. Seeds are dispersed by wind with the aid of fluffy tufts. The leaves have three noticeable veins that run along their edges.