Lecture PDF - Green Jobs New England

PLS350: Herbaceous Garden Plants
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Lady's Mantle
Alchemilla mollis
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Rosaceae
Carpathians, Caucasus, Turkey
24 in
Yellow-green from May to July.
Silky-haired, rounded, shallow lobes (9-11), toothed, green
Moist meadows and woodland margins
Clump-forming foliage plants
Perennial
Zone: N/A
Moist soil, sun to part shade. Deadhead to prevent reseeding. Cut back in
summer for new growth in autumn. Do not cut back over winter.
L-Scape: Border, ground cover. Drought tolerant.
Pests: Slugs, snails.
Cultivars:
Calendula officinalis
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English Marigold, Pot Marigold
Asteraceae
S. Europe to N. Africa
12-30
12 -18
Daisy-like, 2-4
6
Erect, spreading annual
Annual
Zone: N/A
Moderately fertile well-drained soil in full sun to part-shade; deadhead to
prolong blooming. Flowers long lasting as cut flowers and bloom over a
long period in gardens.
L-Scape: Containers, window boxes, bedding and informal borders, cutting garden
Pests: Smuts, rust, grey mold, mosaic virus, aster yellows, aphids
Cultivars: Many "series" and cultivars available - 'Lemon Queen' - double
flowerheads; 'Bon Bon' - dwarf, compact
Study Card
PLS350: Herbaceous Garden Plants
Dicentra species
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Bleeding Heart
Fumariaceae
North America, Japan
2-3 ft
Flowers arranged in racemes to 9; Most garden cultivars are hybrids of D.
eximia and D. formosa
Leaves: D. spectabilis - lvs. compound; D. eximia & D. cucullaria - lvs compound &
finely dissected
Texture:
Habitat: Sunny forest floors
Habit: Arching branches create round growth habit
Type: Perennial
Zone: N/A
Culture: Part shade. Foliage will die back in late summer on spectabilis. Needs
moisture.
L-Scape: Shady border, spring garden
Pests: Stem rot
Cultivars: 4 species common: D. spectabilis, Common B.H., D. cucullaria,
Dutchmans Breeches, D. eximia, Fringed B.H., & D. formosa, Pacific B.H.
Eschscholzia californica
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California Poppy
Papaveraceae
California and Oregon
6 to 15 in
Red, orange to pale yellow, to 2+
Alternate, ternately dissected, blue-gray-green and basal
Airy upright
Rounded
Perennial
Zone: N/A
Full sun, well drained sandy soils. Tolerant of part shade.
Bed, border, containers, naturalizing (meadows); Perennial in warmer
climates, annual in cooler areas.
Pests: None serious
Cultivars: 'Apricot Flambeau', 'Thai Silk' Series, 'Ballerina', 'Carmine King', 'Dali'
Study Card
PLS350: Herbaceous Garden Plants
Gaillardia x grandiflora
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Blanket Flower
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Asteraceae
Western USA
1-3'. tall by 1- 2'. wide
18-24
3-4
Gray-green.
Vertical, upright interest
Ornamental grass
Sprawling; shorter varieties upright and clump forming
Perennial
Zone: N/A
Full sun, light, well-drained soil; withstands drought and heat. Very hardy.
Zones 2-9
L-Scape: Border, cutting
Pests: Mildews, white smut, rusts,bacterial and Septoria fungal leaf spots, slugs
and snails
Cultivars: 'Baby Cole'—dwarf (8"); 'Dazzler'—orange yellow; 'Kobold'—12" red with
yellow center; 'Arizona Sun' 12" tall - everbloomer.
Lobularia maritima
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Sweet Alyssum
Brassicaceae
Canary Island; Mediterranean
3 - 12
8-12
Small fragrant, white, pink, rose, blue, peach flowers - blooms all summer
Linear, lance-shapoed to oblong,, light to mid-green leaves
Full, but airy
Mounding, slightly cascading
Annual
Zone: N/A
Full sun, well drained, fertile soil; shear back when bloom becomes sparse
to encourage second flush
L-Scape: Edging, rock gardens, window boxes/container
Pests: Downy mildew, slugs, flea beetles, clubroot
Cultivars: 'Rosie O'Day' - rose colored flowers: 'Carpet of Snow' - white flowers often scented
Study Card
PLS350: Herbaceous Garden Plants
Onoclea sensibilis
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Sensitive Fern
Dryopteridaceae
Eastern Asia, Eastern North America
To 24
Emerge pinkish bronze, fronds green. Broadly lobed.
MOIST/WET
Upright, arching
Perennial
Zone: N/A
Damp site, sheltered, acidic soil, dappled shade, sun will scorch fronds.
Waters edge, border, woodland gardens Focal point, Erosion protection
Rust prone
Osteospermum hybrids
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African Daisy
Asteraceae
Hybrid (S. Africa)
12-18
8-12
Large, daisy-like heads white, pink, violet, or purple, with darker underside
to the rays. Entire or
Leaves: Irregularly toothed
Texture:
Habitat:
Habit: Prostrate trailing, sometimes slightly upright, annual
Type: Annual
Zone: N/A
Culture: Full sun; cut back to extend bloom; Tolerant of heat and dry. More at:
www.osteospermum.com Frost hardy
L-Scape: Border, container, rock gardens, dry banks (California freeways)
Pests: Aphjids, downy mildew and Verticillium wilt (fungal)
Cultivars: 'Pink eyes'; 'Whirligig'
Study Card
PLS350: Herbaceous Garden Plants
Physostegia virginiana
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Obedient Plant
Lamiaceae
Eastern North America
2-4 ft
24 - 30 in
Spikes of pink, purple, or white in widely spaced vertical rows; blooms late
summer to fall
Opposite, 3-5
Upright
MOIST/WET
Erect with width up to 3'; USDA zones: 4-8
Perennial
Zone: N/A
Sun to part shade, vigorous to aggressive spreader, may require frequent
pulling.
Cut flowers, naturalized or informal wildflower gardens
Occasional rust; slugs
'Alba', 'Bouquet Rose', 'Variegata'
Platycodon grandiflorus
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Balloon Flower
Campanulaceae
China, Japan
24
Puffy, balloon-shaped just before opening, then bell-shaped; pink, blue or
white flowers late summer
Ovate to lanced-shaped, toothed, bluish green leaves whorled on lower
stem, alternately higher up
Upright, clumping
Sun, p. shade
Erect to flopping
Perennial
Zone: N/A
Sun; WD, fertile, loamy, not wet, soil, frost hardy; slow to establish; late
breaking. May need staking. Established plants resent disturbance
Border, cutting (cauterize stem)
Leaf spot, blight , snails, slugs
Var. 'Alba' = white; 'Fuji', 'Double Blue'
Study Card
PLS350: Herbaceous Garden Plants
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American Marigold
Tagetes erecta
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Asteraceae
To 24
Yellow / Orange,1x / 2x flower heads no red (T. patula)
Deeply lobed, aromatic to the touch
Annual
Zone: N/A
Full sun, fertile soil Deadhead
Bedding, edging
Many
Bedding Verbena
Verbena x hybrida
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Verbenaceae
N/a
8-15
N/a
Fragrant violet, red, white, blue flowers
Irregularly shaped, toothed; opposite
N/a
Upright
Annual
Full sun, very good drainage
Bedding, containers
Root rots; powdery mildew
Many
Zone: N/A
Study Card