Green Roof Plants Plants
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Acorus gramineus 'Minimus Aureus'
Dwarf Golden Sweet Flag is a wonderful plant for walkways as well as rain gardens and stream edges, because it is tolerant of foot traffic as well as significant moisture. The evergreen foliage is like tiny thick bladed grass tufts and when crushed, it releases an attractive sweet scent. The tufts slowly expand to make a short yellowish green mat. Although it looks like a grass, Acorus gramineus 'Minimus Aureus' is actually more closely related to the Iris family.
H: 4 Inches · S: 8 Inches · Zone: 5
Ajuga reptans 'Pink Lightning' PP22255
Short mauve pink flower spikes above crinkled green and white leaves in mid spring. A semi-evergreen shade groundcover.
H: 6 Inches · S: 6 Inches · Zone: 4
Alchemilla mollis 'Thriller'
'Thriller' Lady's Mantle blooms in May and June, producing airy delicate chartreuse yellow flowers held above fuzzy bluish green leaves. 'Thriller' has somewhat larger pleated leaves than the species, and like all Alchemilla mollis, the hairy leaves repel rain water so that the foliage has attractive silver water drops on if after a gentle rain. 'Thriller' performs best in shady, moist conditions.
H: 18 Inches · S: 24 Inches · Zone: 3
Allium cernuum
Allium cernuum, or nodding Pink Onion, is a tough deer resistant bulb plant which is crowned by multiple pink flower umbels. The blooms appear above the green strap-like leaves in July and August. These are followed by attractive tan seedheads. The clumps increase in size as time goes on and the bulbs can be divided and spread to make a lovely addition to short meadows in mid summer. Self-seeds vigorously in the garden.
H: 16 Inches · S: 12 Inches · Zone: 3
Allium schoenoprasum 'Forescate'
Dark pink drumstick flowers are held over green chive foliage in June and July. Pollinators love Alliums and deer never eat them.
H: 18 Inches · S: 12 Inches · Zone: 2
Allium schoenoprasum 'Snowcap'
'Snowcap' Chives produces delicate white flowers above tubular foliage in early to mid summer. The bloom period is prolonged if Allium 'Snowcap' is deadheaded, which also keeps it from seeding itself in flowerbeds. The leaves are edible (this is a cultivar of edible chives), but are not touched by deer or rabbits. Alliums are bulbs, so 'Snowcap' is easily divided when dormant. A Mark McDonough introduction.
H: 12 Inches · S: 12 Inches · Zone: 3
Allium senescens 'Blue Eddy'
Pinkish lavender round flowers in August above blue gray swirly strap-like foliage. Resistant to deer, attractive to pollinators.
H: 12 Inches · S: 12 Inches · Zone: 4
Allium x 'Lavender Bubbles' PP31126
Deep purple drumstick flowers appear above blue green flat leaves in late summer. Hummingbirds and pollinators love it, deer don't.
H: 12 Inches · S: 20 Inches · Zone: 4
Allium x 'Pink Planet'
Large lilac pink globular flowers top glaucous flat leaves in mid summer. Good for pollinator gardens. Dried seedheads are attractive
H: 18 Inches · S: 24 Inches · Zone: 4
Allium x 'Windy City' PP28100
Dark purple buds open to purple globes above green flat leaves in mid summer. Deer resistant and drought tolerance.
H: 18 Inches · S: 16 Inches · Zone: 5
Amsonia tabernaemontana 'Storm Cloud'
Sky blue flower clusters top black stems and willowy green foliage, blooms in May and early June. Early stems look like black Asparagus.
H: 24 Inches · S: 36 Inches · Zone: 4
Antennaria plantaginifolia
Clusters of inconspicuous, fluffy white flowerheads with flecks of pink appear above woolly silver-gray foliage from April to June. Great for poor, rocky and sandy soils in full sun conditions.
H: 6 Inches · S: 12 Inches · Zone: 3
Artemisia x GardenGhost™ PP33773
Compact, densely branching groundcover with unique silvery gray foliage that provides a textural, ghostly component to the full sun garden. Heat and drought resistant.
H: 12 Inches · S: 30 Inches · Zone: 4
Asclepias tuberosa
Lovely orange and yellow flowers in June and July, followed by small milkweed pods. Butterfly Weed is an important food source for Monarch butterflies in particular. Must have dry site, seeds well on sunny slopes or gravelly sites.
H: 24 Inches · S: 24 Inches · Zone: 3
Aster ericoides 'Snow Flurry'
Small white daisy-like flowers cover short green leaves and stems in late summer and early fall. Forms a dense green mat which makes a good native groundcover.
H: 8 Inches · S: 24 Inches · Zone: 4
Aster oblongifolius 'October Skies'
'October Skies' Aromatic Aster has medium blue flowers in September and October. 'October Skies' is tolerant of dry, poor soil sites. A Primrose Path introduction (New name is Symphyotricum oblongifolium).
H: 24 Inches · S: 24 Inches · Zone: 5
Aster oblongifolius 'Raydon's Favorite'
Masses of delicate clear blue flowers appear on 'Raydon's Favorite' Aromatic Aster in September and October. 'Raydon's Favorite' is tolerant of dry, rocky sites which makes sense because it was found in San Antonio, Texas by Raydon Alexander. One of famed plantsman, Rick Darke's favorites (New name is Symphyotricum oblongifolium).
H: 36 Inches · S: 36 Inches · Zone: 3
Bouteloua curtipendula
Tan seedheads with pendant oat-like seeds are displayed over green blades in mid to late summer. Showy in mass and tolerant of dry sterile soils. Fall color is often attractive.
H: 30 Inches · S: 20 Inches · Zone: 3
Bouteloua gracilis
Native warm-season grass with persistent, unique looking inflorescences that remain upright from their arrival in late June and persist deep into winter. Highly drought tolerant, adaptable to poor soils, occasional mowing, and light foot traffic. Lawn alternative.
H: 14 Inches · S: 20 Inches · Zone: 3
Bouteloua gracilis 'Blonde Ambition' PP22048
'Blonde Ambition' Blue Grama is a lovely low maintenance native grass which has unusually shaped inflorescences. The orange to straw colored flowers are held horizontally off the stems, so that they look like tiny feathers. This is especially lovely when back lit by afternoon sun. When planted in mass, Bouteloua 'Blonde Ambition' can serve as an infrequently mowed lawn, since it does best in full sun. It was introduced by David Salman of High Country Gardens, and brought to our attention by Steve Castorani of North Creek Nurseries.
H: 24 Inches · S: 18 Inches · Zone: 4
Calamintha nepeta subsp. nepeta
Lots of small white to lavender flowers cover grey-green fragrant foliage in mid summer to fall. A good pollinator-friendly informal groundcover.
H: 12 Inches · S: 16 Inches · Zone: 5
Callirhoe involucrata
Large cup-shaped magenta flowers above green dissected leaves all summer. Needs full sun and good drainage. Makes a sprawling mat.
H: 6 Inches · S: 24 Inches · Zone: 4
Campanula carpatica 'Rapido Blue'
Violet blue upward facing bells thickly cover the green mat of foliage in late spring and early summer. Makes a good addition to rock gardens.
H: 6 Inches · S: 8 Inches · Zone: 3
Campanula carpatica 'Rapido White'
Masses of white cup-shaped flowers crown the green ground hugging foliage starting in late spring. Will rebloom throughout the summer if deadheaded.
H: 6 Inches · S: 8 Inches · Zone: 4