perennial

Euphorbia ‘Mrs. Robb’s Bonnet’

Euphorbia amygdaloides ‘ Robbiae’ For gardeners on the lookout for plants with multi-season interest, this perennial euphorbia merits examination. In spring and summer, rosettes of leaves are a shiny deep green, a good backdrop for sprays of chartreuse flowers in late spring/early summer. In fall,...

Blue-eyed grass

Sisyrinchium angustifolium This native is not a true grass but a member of the iris family, a small blue-eyed beauty that should not be missed. Growing about 12 inches tall, this clump-forming perennial features narrow grass-like leaves and violet-blue flowers with a yellow center that appear on...

Blue Mist Flower, Hardy Ageratum

Conoclinium coelestrium Blue is not a common bloom color this time of year. Yet hardy ageratum, with its fuzzy-headed old-fashioned look, adds its blue-purple toned flowers and attracts butterflies to the garden from late summer until late in fall. Native to the eastern U.S., hardy ageratum looks...

Ironweed, New York Ironweed

Ironweed
Vernonia noveboracensis The rich glowing purple of ironweed blooms pop against the warm autumn hues of goldenrod and mums. Depending upon its site, ironweed may reach 4 feet in the back of the perennial bed or soar 7 feet or more. This Maryland native is a butterfly favorite. Plant in full sun to...

Wood Spurge

Wood Spurge
Euphorbia amygdaloides var. robbiae Wood spurge makes a low maintenance evergreen perennial groundcover for a wide range of conditions. Dark green, glossy leathery leaves grow in tight rosettes on the stems. In early spring, lime green bracts appear on stalks 12 inches above the foliage and almost...

Hardy Begonia

Begonia-grandis Photo by Robert Lyons This year many Maryland gardeners are growing annual begonias as replacements for disease-plagued impatiens. Like impatiens, these annual begonias will go back to the earth with the first frost, never to rise again. However the genus Begonia is huge with over 1...

Rose of Sharon ‘Helene’

Hibiscu s syriacus ‘Helene’ P hoto by Ellen Nibali Rose of Sharon has been beloved for centuries for its prolific bloom during summer doldrums when most flowering shrubs grind to a halt. However, due to nuisance seedlings, it was banished from many gardens. Thanks to the U.S. National Arboretum, we...

Fountain Grass ‘Karley Rose’

Pennisetum orientale ‘Karley Rose’ When drought hits a summer garden, the rosy pink plumes of ‘Karley Rose’ are as perky as ever. This ornamental grass can be used as the backbone of perennial beds or a low dense screen. Clumps grow about 3-4 feet tall and wide. Above its clean disease-resistant...

Featured Plants - Red-Veined Dock

Photo by Marian Hengemihle
Rumex sanguineus With a preference for damp soils, this dramatic foliage plant is a terrific accent in mixed containers, borders, and along pond margins, but its best use is a container plant in water gardens and ponds. Lance-shaped leaves with striking burgundy veins provide excellent color and...

Featured Plants - Shasta Daisy 'Becky'

Shasta Daisy ‘Becky’ photo by Marian Hengemihle
Leucanthemum x superbum It’s easy to see why Shasta daisy cultivar ‘Becky’ earned the distinctive "Perennial Plant of the Year” award for 2003. Showy and reliable this clump-forming perennial is a must have for your summer garden. The large flowers are a clear white held on strong stems that...

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