Plants
That bloom in the summer
Silene regia
Royal catchfly
Where can you find this plant? In Ohio: Prairies of southwest Ohio. At HF&G: Arlene & Arthur S. Holden, Jr. Butterfly Garden; Wildflower Garden, south end, and Prairie Garden. Bloom... more
Rhododendron calendulaceum
Flame azalea
Where can you find this plant? In Ohio: Only in unglaciated southeastern parts on rock outcrops. At HF&G: Holden Arboretum, Wildflower Garden, Rhododendron and Discovery Gardens. Bloom time: May-June, usually... more
Impatiens capensis
Common jewelweed
Where can you find this plant? In Ohio: Throughout, floodplain forests, disturbed wetlands, moist woodland edges. At HF&G: Cleveland Botanical Garden, Woodland Garden; Holden Arboretum, Wildflower Garden, Rhododendron Garden. Growing... more
Ratibida pinnata
Ratibida pinnata (grayheaded coneflower)
Ratibida pinnata is a tall, slender perennial that is found in dry woods and prairies. It does best in full to partial sun with medium soil moisture requirements. Ratibida pinnata has a yellow composite flower that... more
Phlox paniculata 'Laura’
Phlox paniculata ‘Laura’ (garden phlox)
This garden phlox cultivar is easy to grow and purportedly mildew resistant, preferring full sun and moist, humus-rich soil. The dense flowers of phlox ‘Laura’ are deep lavender purple with a white eye... more
Penstemon digitalis
Penstemon digitalis (foxglove beardtongue)
Penstemon digitalis is an upright, clump forming perennial wildflower featuring deep green leaves on strong upright stems. In summer, plants are topped by showy tubular snapdragon-like white flowers which are frequently visited by pollinators. It flourishes in sunny sites with wet or moist... more
Lobelia siphilitica
Lobelia siphilitica (great blue lobelia)
Lobelia siphilitica is a clump forming perennial that thrives in a moist location. It adapts well to different light conditions like sun or shade as long as it has consistent moisture. The tubular blue flowers start to bloom in July and continue into September. Hummingbirds are enticed by these flowers. ... more
Liatris microcephala
Liatris microcephala (Appalachian blazing star)
Liatris microcephala is a small upright, clump former. This super cute perennial has grass like foliage with miniature purple flowers that bloom in late summer. This small but mighty plant tolerates xeric growing conditions and is best suited for... more
Iris versicolor ‘Purple Flame’
Iris versicolor ‘Purple Flame’ (blue flag iris)
Iris versicolor ‘Purple Flame’ is a great choice for the edge of a pond or along a stream bank. In early spring deep purple foliage emerges. As the plants begin to mature the foliage... more
Ionactis linariifolius
Ionactis linariifolius (stiff aster)
Stiff aster is an excellent, long-blooming, compact aster ideal for rock gardens or the front of the border and look great massed in groups. Ionactis linariifolius is easily grown in average, dry to medium, well-drained soil in full sun. The rather distinctive linear leaves are narrow and almost needle-like. Small... more
Heuchera ‘Palace Purple’
Heuchera ‘Palace Purple’ (coral bells)
This cultivar is a clump-forming perennial featuring a mound of maple-shaped basal leaves which are an attractive deep purple above and red beneath. Tiny, pinkish white, bell-shaped flowers adorn dark red stems extending well above... more
Chelone glabra ‘Black Ace’
Chelone glabra ‘Black Ace’ (turtlehead)
A cultivar of our native white turtlehead (see Chelone glabra above), ‘Black Ace’s’ distinguishing feature is its dark ebony-green foliage that appears in spring and provides a striking contrast the white snapdragon-like flowers of late summer. ‘Black... more
Asclepias verticillata
Asclepias verticillata (whorled milkweed)
One of the most charming species of milkweed, A. verticillata’s finely textured needle-thin leaves whorl around its stem towards clusters of dainty white fragrant flowers that bloom between June and September. Both drought and deer resistant, “Whorled” milkweed... more
Salvia nemorosa ‘Caradonna’
Salvia nemorosa ‘Caradonna’ (woodland sage)
Woodland sage, is an erect, many-branched, woody-based, clump-forming perennial. It is native to Europe and west-central Asia. It features lavender to violet blue flowers with tiny reddish-purple bracts and blooms from June to September. Flowers are attractive... more
Kirengeshoma palmata
Kirengeshoma palmata (yellow wax bells)
Yellow wax bells is a large shade-loving herbaceous perennial native to mountainous areas of Japan and Korea. It offers a shrub-like habit, coarse texture, and pale-yellow flowers from late summer to early fall. This elegant plant in the... more
Indigofera heterantha
Indigofera heterantha (Himalayan indigo)
This shrub in the pea family is native to Himalaya as well as Afghanistan and Tibet. It is suited to a wide range of soil conditions but prefers slightly moist, well-drained soil. Grows in full to part... more
Geranium sanguineum v. striatum
Geranium sanguineum v. striatum (bloody cranesbill)
Bloody cranesbill is an herbaceous, clump-forming perennial that typically grows in a mound with white-hairy trailing stems which spread over time to as much as 24” wide. While it is native to Europe and Asia, it... more
Callicarpa b. ‘Profusion’
Callicarpa b. ‘Profusion’ (beautyberry)
Callicarpa bodinieri ‘Profusion’ features an outstanding display of violet-purple fruits in fall. Forms a vigorous bushy shrub with small lavender flowers in July and August. New leaf growth has a bronze tinge. Easily grown in sun or... more
Astilbe ‘Deutschland’
Astilbe ‘Deutschland’ (astilbe)
Plants are characterized by graceful, fern-like mounds of mostly basal leaves. Plumes of snow white, feathery flowers create a very showy landscape accent in moist areas in a shaded to dappled shade setting. ‘Deutschland’, a hybrid cultivar of Japanese... more
Acanthus spinosus
Acanthus spinosus (bear’s breeches)
Acanthus spinosus has shiny dark green leaves which are deeply dissected and tipped with spines (hence deer resistant). The handsome foliage adds great coarse texture to a partial shaded garden. Features pure white, snapdragon-like flowers surrounded by contrasting spiny purple bracts that last all season. Large flower spikes... more
Rhododendron ‘Wintergreen’
Evergreen azalea ‘Wintergreen’
Polly Hill was an exceptional plantswoman from Martha’s Vineyard. Many of Polly’s azaleas are interspecific hybrids involving an incredibly compact azalea from Taiwan called Rhododendron nakaharae. ‘Wintergreen’ has light red blooms mid-June into... more
Rhododendron ‘Pink Pancake’
Evergreen azalea ‘Pink Pancake’
Polly Hill was an exceptional plantswoman from Martha’s Vineyard. Many of Polly’s azaleas are interspecific hybrids involving an incredibly compact azalea from Taiwan called Rhododendron nakaharae. ‘Pink Pancake’ is a flat grower,... more
Rhododendron ‘Komo Kulshan’
Evergreen azalea ‘Komo Kulshan’
A favorite of the staff at the David G. Leach Research Station. This cultivar, and another offered this year (‘Mangetsu’), is often attributed to a Japanese species called the Kyushu azalea, Rhododendron kiusianum. But azaleas... more
Rhododendron ’Joseph Hill’
Evergreen azalea ’Joseph Hill’
Polly Hill was an exceptional plantswoman from Martha’s Vineyard. Many of Polly’s azaleas are interspecific hybrids involving an incredibly compact azalea from Taiwan called Rhododendron nakaharae. ‘Joseph Hill’ is a trailing, red-flowered evergreen shrub that makes an excellent... more
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