Long Blooming Perennials Dennis Morgeson Agent For Horticulture Washington County
Apr 03, 2016
Long Blooming Perennials
Dennis Morgeson
Agent For Horticulture
Washington County
What are perennials?
0 Plants that live for several years
0 Mostly herbaceous in nature
0 Multiply by seeds and increase in size of parent plant
0 Most grow from a crown, stolon's or rhizomes
0 Some live for a few years, some for decades
Perennials
Care issues:
Preparing the soil
Spacing
Planting and transplanting
Propagation
Watering, one inch per week
Fertilizing, 2-3 lbs. 5-10-10, two spring applications
Perennial Considerations
Design issues:
0 Height, placement in the bed or border
0 Color combinations
0Continuation of bloom!!!! 0 Foliage textures
Achillea filipendulina- Yarrow
0Many colors, flower in late spring to summer
02-3 feet tall and wide, dwarf varieties 8-15 inches
0Few pests
0Borders, cut flowers, dried
0Cuttings or division in spring or fall, some by seed
0Varieties-Coronation Gold, Gold Coin Dwarf, Goldie, Moonshine
0Trim back after bloom for rebloom
Achillea millifolium- yarrow 0 Wider range of colors
than previous species
0 Generally grows no more than 2 feet tall
0 Spreads faster, can become aggressive
0 Performs well in dry areas
0 Lots of varieties such as Paprika, Strawberry Seduction, Pomegranate, Summer Wine, etc.
0 Trim back after bloom for rebloom
Agastache (Hyssop) 0 Likes full sun and well
drained soils
0 Grows up to 3 feet wide and tall
0 Pinch early to keep them more compact but not required
0 Doesn’t do well in wet heavy clay but thrives in well drained soils
0 Pollinator and insect magnet
0 Blooms all summer
Agastache Varieties
Black Adder Blue Fortune Golden Jubilee
Kudos Gold Raspberry Summer
Aster spp. - Asters
0Flowers in blues, violets, whites in summer and fall
01-6 feet tall, taller varieties must be staked
0Powdery mildew is the major pest
0Used for borders and cut flowers
0Propagate by division in spring
Asters
Blue Autumn Little Carlow
Winston Churchill
Aster tataricus “Jindai”
Baltonia asteroides (False Aster)
0 Grows 3-5 feet tall and wide will need staking
0 Plant in full to part sun, tolerant of a variety of soils
0 This is an undemanding native loved by butterflies!
0 Blooms August until frost
Pink Beauty
Snowbank
Centranthus ruber- Jupiter’s beard
0 Vigorous perennial for well-drained soils
0 Tolerates poor soils if drainage is good
0 Dead head to extend bloom season
0 Red Valerian
Ceratostigma plumbaginoides – leadwort
Plant in full to part sun
Will tolerate some shade
but prefers full sun in
average soil
Generally late to emerge
but blooms from mid
summer until frost and
gives a nice fall color
Wiry semi woody
groundcover, grows 9-12
inches tall and 18 inches
wide
Chrysanthemum x superbum (Lucanthemum x superbum)– Shasta
Daisy 0White flowers in early spring
01-3 feet tall
0Major pest – aphids
0Used in borders, cut flowers
0Propagate by division in fall, seed
Shasta Daisy
Summer Ice Lacrosse (Compact Habit) Becky
Coreopsis -tickseed
0 Many species with varying plant habits
0 New colors and all bloom for an extended period, also varying foliage types
0 Dead head to extend bloom season
0 Best divided regularly to maintain vigor
Coreopsis
Cosmic Eye 12-20” Crème Brulee 8-12” Full Moon 18”
Coreopsis
Jethro Tull Red Satin Route 66 Sienna Sunset
Sweet Dreams
Zagreb Moonbeam
Dianthus - pinks
0 Many species and forms, many evergreen, prefers full sun and well drained soil
0 Most are easily grown
0 Range in height from 4”-3’
0 Many form spreading groundcovers
0 Attractive spiky silver foliage
0 Fragrant, rebloom after cut back and in fall
0 Attracts butterflies
Dianthus
Agatha Arctic Flame Bath’s Pink Pink Swirl
Desmond Horatio Helen
Greystone
Echinacea – Coneflower
0Varied flower colors but the purple and white still seem hardier 0Varying heights from 1-5 feet tall 0Major pest is powdery mildew 0Used as border or cut flowers 0Divide clumps in spring or by seed 0Deadhead for repeat bloom 0Yellow Finch will eat seeds if allowed to mature
Coneflower
Cheyenne Spirit Firebird Double Decker
Leilani
Pallida*
Paradoxa* Secret Pride Pink Poodle
Geranium sanguineum - Cranesbill Geranium
0Flowers in white, violet, red in late spring 01 - 1½ feet tall 0Few pests 0Used as a border or edge plant, protect from afternoon sun 0Propagate by seed, some by cutting 0Deer resistant, groundcover, attracts butterflies
Hardy Geranium
Ballerina Bevans Variety Biokova
Dark Reiter
Purple Who Samobor
Rozanne Wlassovianum
Eupatorium coelestinum – hardy ageratum
0 Very vigorous plant, particularly in moist soils
0 Cut back in summer to shorten and increase flowering
0 Divide regularly
Wayside
Eupatorium rugosum
0 Grows 3-5 feet tall and 3 feet wide
0 Mid summer to fall bloom
0 Full Sun to half sun
0 Normal soil even clay
0 Attracts butterflies, wet site tolerant as well
0 Purple green foliage also ads interest Chocolate
Eupatorium purpureum* – Joe pye weed
0 Stately perennial can grow to 10‘ Native plant attracts butterflies
0 Smaller dwarf versions are available
0 May reseed around the garden
0 Enjoys wet locations but will grow in average garden soil
Joe Pye Weed
Gateway 6’ Fistulosum* 3-4’ Little Joe 3-4’
Euphorbia - spurge
0 Many different forms, some evergreen
0 Very tolerant of poor dry soils
0 Milky sap may be an irritant to skin or eyes
0 Deer resistant and drought tolerant
0 Often self seeds Robbiae
Euphorbia
Bonfire Polychroma* Tiny Tim
Jade
Dragon Chameleon
Gaillardia x grandiflora – blanket flower
0 Very long bloom period in summer
0 Tends to be short lived
0 Excellent for dry areas
0 Often seeds itself in good soils
0 Deer resistant
0 Attracts butterflies
0 Drought Tolerant
Gaillardia
Bright Bicolour Yellow Peach Sun Flare
Red Sun Sun
Devil
Helenium autumnale- sneezeweed
0 Tall perennial valued for its fall blooms in yellow orange and red (newer shorter varieties)
0 Prune in summer or stake to support
0 Adaptable plant tolerates many soil types
0 Native
0 Can reseed
Sneezeweed
Mardi Gras
Moerheim
Beauty Autumnale*
Tiny Dancer
Red Jewel Carnival
Double Trouble
Heliopsis helianthoides
0Yellow flowers in summer and early fall
03-4 feet tall
0Few pests
0Used as a border or cut flower
0Propagate by seed or division
0Touch Plant!
Heliopsis helianthoides
Summer Nights Summer Sun Lemon Queen
Lorraine
Sunburst
Asahi
Hibiscus moscheutos – Hardy Hibiscus
White, red, pink and bicolors in summer, newer varieties bloom until late fall 3-8 feet tall, taller ones require staking Major pests are Japanese beetles and caterpillars Used as border plants Propagate by division or seed Prefers moisture but tolerates drought
Hardy Hibiscus
Fantasia Fireball Kopper King Lady Baltimore
Lord
Baltimore Plum Crazy
Hardy Hibiscus
Robert
Flemming
Sweet Caroline Moscheutos* Blue River II Heartthrob
Cherry
Cheesecake
Midnight
Marvel Summer Storm
Monarda - beebalm
0 Very vigorous plant is invasive in good soils
0 Loved by hummingbirds and butterflies
0 Tolerates moist areas
0 Powdery mildew is a huge problem prune hard to control or select mildew resistant varieties Jacob Cline
Beebalm Petite
Delight
Raspberry
Wine Claire Grace
Blue Stockings
Fireball Pardon My
Purple
Grand Mum
Oenothera fruiticosa
0 Rapidly spreading plant with yellow flowers in spring
0 Often short lived
0 Reddish stems
0 Tolerates dry soils
Fireworks
Other Oenothera
Summer Solstice
(tertragona)
Sunset
Boulevard
(versicolor)
Oenothera speciosa – showy primrose
0 Aggressive- leaning toward invasive
0 Large pink flowers over a long period in spring and summer
0 Cut back after bloom to encourage repeat
0 Deer Resistant
0 Groundcover
Siskiyou
Perovskia atriplicifolia - Russian Sage
0Blue flowers in summer
04-6 feet tall, shrubby
0Few pests
0Used as a border
0Propagate by cuttings, division, or seed
Little Spire
Filigran
Superba
Physostegia virginiana – obedient plant
0 Native plant in pink or white
0 Spreads aggressively in good soils
0 Tolerates moist areas
0 Good cut flower
0 Divide frequently
Miss Manners
Pink Manners
Vivid
Rudbeckia fulgida - Black-eyed Susan
0Yellow flowers in summer to fall
02-3 feet tall
0Powdery mildew is the main pest problem
0Used as a border, cut or meadow flower
0Propagation by division or seed
Goldstrum
Rudbeckia Fulgida Little Goldstar
lancinata* Autumn Sun
maxima*
Henry
Eilers
Salvia nemorosa – Garden Sage
0 Reliable plant with long bloom season in late spring
0 good for drier areas
0 Aromatic foliage
0 Cut back after bloom for a second, smaller flush of bloom
Blue Hill
Garden Sage
Caradonna
New Dimension
Blue Marcus May Night
Sensation
Deep Rose
Plumosa
Swan Lake
Sedum spp. - Stonecrop
0Yellow, orange, red flowers in summer but generally grown more for foliage
03-8 inches
0Few pests
0Used for edging, ground covers, rock gardens
0Propagation by division or seed
Sedum spectabile - Showy Sedum
0Pink, red, white, lilac flowers in late summer and early fall
012-18 inches tall
0Few pests
0Used as a border, edging, cut flower or dried
0Propagation by division or cuttings
0Drought tolerant Autumn Joy
Sedum Autumn Charm
Autumn
Fire Blade Runner Blue Spruce Brilliant
Carl Cherry Tart Dragons Tongue Munstead Red Murale
Sedum Neon Pool Party
Purple
Emperor
Red Cauli
T Rex Turkish
Delight
Mendoza
Begonia grandis - Hardy Begonia
0Pink flowers in summer
018-24 inches tall
0Few pests
0Used in borders
0Propagate by tubers (may not be hardy) or bulbils
0Full to part shade in protected sites only
Helleborus orientalis – Lenten Rose
0White or purple flowers in late winter and early spring
012-15 inches tall
0Few pests
0Used as a border plant
0Propagate by division or seed
0Shade!
Hellebores Amber Gem
Cotton
Candy Rose Queen
Sunshine Selections
Black Onyx Golden Lotus
.
Questions?