Ohio is a state that borders the subtropical bluegrass region of the Mid-South and the snowbelt outside of Lake Erie. Ohio has moderate winters and humid summers with a modest amount of rainfall year round. Because of this, a number of subtropical plants grow well in Ohio's interior ranges, giving Ohio a wide range of native flowers in summer.
Dutchman's breeches are more popularly known as bleeding heart. Dutchman's breeches is a woodland plant that can be found on the forest floor of many wooded areas of Ohio. It is marked by feathery foliage and a stalk that produces pantaloon- or open-heart shaped flowers that bloom through June. The plant is a perennial that returns yearly from rhizomes. Its unique shape has made it a popular plant for shade gardens and houseplants. Dutchman's breeches is poisonous, which makes it a dangerous houseplant in homes with pets or children.
The Canada anemone is a distant cousin to the buttercup that grows along prairie and in forest clearings. The plant grows on foot-high stalks and produces 1 inch wide white flowers from May through July. Landscapers avoid using this flower in the home landscape because it has a tendency to become invasive.
The butterfly weed grows well in the sandy soil of the Lake Erie region. You can recognize butterfly weed by its 1 to 3 foot tall stalks that produce orange colored blooms from June until September. The plant is a distant relation to the milkweed, but does not produce the milky sap for which the milkweed is known. Transplant the butterfly weed when young or started from seed in their final location. Transplanting mature plants is difficult because butterfly weed produce a deep taproot that is easily broken during transplant.
Marsh Blue Violet
As the name implies, marsh blue violets grow in swampy or marshy areas of Ohio. The perennial plant produces blue-violet flowers at the top of stalks that range from 6 to 12 inches in height from spring through early summer. At the base of the plants, marsh blue violets produce heart shaped leaves that are less than 6 inches in length.