Transcript Oklahoma Proven HCE 2013

Oklahoma Proven
Plant Selections
David Hillock,
Assistant Extension
Specialist
Department of Horticulture & L.A.
Oklahoma State University
Selection Criteria
 Appropriate for
gardens throughout
Oklahoma.
 Readily available in the trade.
 Can be profitably produced.
 Limited input required, i.e. few pest or
disease problems, tolerant of Oklahoma’s
diverse soil types and weather conditions.
 Non-invasive.
5 Selections Each Year
 Annual
 Perennial
 Shrub
 Tree
 Collector’s
Choice
• Started in 2009
Oklahoma Proven Sponsors
Tree - 2013
 Winterberry, Euonymus
bungeanus
• Large Shrub to small tree,
15-24’ high and wide.
• Patio tree or specimen.
• Pinkish capsules split to
reveal orange aril (fleshy
seed covering).
• Adaptable ; quite drought
tolerant and resistant to
scale insects.
Shrub - 2013
 Chaste
Tree, Vitex
spp.
• Multi-stemmed large
shrub.
• Flowers blue, lavender,
pink or white (improved
varieties have large,
colorful, and fragrant
flowers).
• Very heat and drought
tolerant. Attracts bees
butterflies/hummingbirds.
Perennial - 2013
 Catmint,
Nepeta x
faassenii
‘Walker’s Low’
• Aromatic graygreen foliage;
lavender blue
flowers.
• Attracts bees and
butterflies;
drought and deer
resistant.
Annual - 2013
 Sneezeweed,
Helenium ‘Dakota
Gold’
• Low mound of bright
golden yellow
flowers.
• Texas wildflower –
heat and drought
tolerant.
• 24” mound, heat
tolerant
Collector’s Choice - 2013
Columnar apple

Specialty Fruit for Small
Spaces including miniature
peaches, columnar apples,
dwarf pomegranate, and
dwarf patio type blueberries



Patio Peach
Exposure: Full sun to part
shade
Soil: Prefers moist, welldrained soil; blueberries
require acidic soil (pH5)
Hardiness: USDA Zone 3-11
(varies by species)
Dwarf Pomegranate fruit
Selection of Plants from
Previous Years
 Program Started
in 1999.
 Due to Time Limitations I have Selected a
few Plants from each Category to Discuss
Today.
 Refer to Handouts for Entire List.
Trees
 Chinese
Pistache
• 30-45’ high
• Robin-egg blue
fruit
• Excellent fall color
Trees
 Bald
Cypress
• 70’ high, 30’ spread
• Wet or dry soil
• Deciduous, coppery
fall color
Trees
 Shumard
Oak
• 40-60’ high
• Yellow to red
fall color
• Drought tolerant
Trees
 Bur
Oak
• OK native
• 60’ tall
• Important
wildlife
species
Trees
 Kentucky Coffee
•
•
•
•
Tree
60’ tall
Male and female trees
Coarse winter texture
OK native
Trees
 Oklahoma Redbud
• Cultivar of Oklahoma’s
state tree, discovered in
Arbuckle Mountains
• Incredible magenta
flowers
• Heart-shaped leaves
with beautiful glossy
sheen
• 15'–25‘ high
• Full sun to part shade
• Well-drained soil
Trees
 American
Elm hybrids -
‘New Harmony’, ‘Valley
Forge’, and ‘Princeton’
• Foliage dark, lustrous
green; yellow to orange
in fall
• Tolerate air pollution,
drought, and a range of
soil pH.
• Dutch Elm Disease
resistant
Trees
 Chinkapin
Oak
• Native, 40-50’ high and
wide.
• Medium in summer,
medium-coarse in winter.
Bark develops into
attractive, irregular blocky
scales.
• Adaptable ; quite drought
resistant and tolerant of
windswept sites.
Shrubs
 Oak-leaf
Hydrangea
• 6-8’ tall
• Spring flowers
• Bronze fall foliage
Shrubs
 Deciduous Holly
(Possumhaw)
• 7-15’ high
• Shrub or small tree
• Persistent fruit
Shrubs
 Japanese
Kerria
• Part to full shade
• Yellow flowers
• Bright green
stems
Shrubs
 Pink
Velour®
Crapemyrtle
• 10’ high
• Burgundy spring
foliage
• Mildew resistant
Shrubs
 Winter
•
•
•
•
Jasmine
Semi-evergreen
4-5’ high, 4-7’ wide
Young stems green
Bright yellow flower
December – March
• Prune after flowering
Shrub (Vine)
 Tangerine Beauty
Crossvine
• Ruby-tangerine
colored flowers
• Semi-evergreen
to evergreen
• Self-clinging
and twining
Shrubs
American
Beautyberry
• Native shrub 5 to 10’
high and wide
• Colorful purple fruits in
fall
• Exposure: Light shade
• Soil: Moist, well-drained
• Hardiness: USDA Zone 6
Shrubs
 Abelia
Kaleidoscope
foliage
hybrids
• Small compact forms
• Seasonal foliar color;
attractive, fragrant flowers
• Use in containers, as
formal/informal hedges,
accent, mass planting, or
foundation planting under
windows
• Attract hummingbirds
‘Little Richard’
Perennials
 Homestead
Purple
Verbena
• Trailing habit
• Deep purple flowers
• Native to N. A.
Perennials
 Magnus
Purple
Coneflower
• 2-3’ tall
• Rose-colored flower
• Heat, drought tolerant
Perennials
 Japanese
Painted
Fern
•
•
•
•
Moist shade
Deciduous fern
12” tall
Cultivars
Perennials
 ‘Golden
Jubilee’
Anise Hyssop
• North American native
• Chartreuse foliage
• Light purple flowers
early summer to fall
• 2’ tall, 1’ wide
• Will reseed
• Licorice scent
Perennials
Hellebore, Lenten
Rose
• Evergreen perennial
• Flowers late winter with
white, yellow or purple
flowers
• Exposure: Shade
• Soil: Moist, well-drained
• Hardiness: USDA Zone 6
Perennials
 Mexican
Feather Grass
• Fine-textured clumping
perennial, silvery flowers
• Drought tolerant and tough
• Two feet tall and three feet
wide do not cut to ground in
spring.
• Native to prairies in TX, NM,
and south to central Mexico
• Exposure: Full sun to part
shade
• Soil: Well-drained
• Hardiness: Zone 7
Perennials
 Giant
Coneflower
• Native to eastern
Oklahoma
• Bright yellow ray flowers
dangle from large, dark
brown cone
• 6-7’ tall,
• Tolerates moist soils
• Strong vertical statement
Annuals
 Purple
Fountain Grass
• 3-4’ tall, mound to
upright arching
• Excellent accent
• Reddish-purple plumes
• Sun to part shade
Annuals
 Mexican
Zinnia
• 1’ tall
• Mildew resistant
• Full sun, thrives in
heat
Annuals
 Margarita
Sweet Potato
• 8” tall, 20’ long
vine
• Use as
groundcover,
hanging basket
or in a container
Annuals
 Yellow
Bells
• Tropical shrub
• 3’ or more
• Loves heat and sun,
prefers moist soil
Annuals
 Firebush
• 3-4’ tall
• Orange-red flowers
• Tolerates heat,
humidity, dry
conditions, almost
any soil
Annuals

Blanket Flower Gaillardia
• Bright red and yellow
flowers bloom in hot, dry
conditions.
• Gaillardia pulchella, is
Oklahoma’s state
wildflower
• Hybrids and new
cultivars expand the color
range and form
• Full sun
• Well-drained soil
Annuals
 Pink
Crystals Ruby
Grass
• Clump forming warmseason grass
• Blue-green leaves and
ruby-pink blooms
• Sun, heat loving
• Spectacular in
container plantings,
mixed borders, beds
Annuals
 Magilla™
Perilla
• Brightly colored
leaves of dark
purple to hot pink
and green
• Coleus look-alike
• Species can be
weedy, but this
clone is sterile
• 24” mound, heat
tolerant
Collector’s Choice - 2010
 Caddo
Sugar Maple
• 30 to 50’ tall
• Native to western Oklahoma.
• Dark green leaves; fall color
variable, yellow to orange to red
• Resistant to leaf tatter and
scorch
• Heat, drought, and high pH
tolerant
• Cultivars available
• Hardiness: Zone 5
Collector’s Choice - 2011
 Silver
Linden
• 50 to 70’ tall
• Leaves dark green upper
surface, silvery beneath; tiny,
white, fragrant flowers attract
honeybees; fall color yellow.
• Heat, drought, and high pH
tolerant
• Cultivars available
• Hardiness: Zones 4-7
Collector’s Choice - 2012
 Sumac
collection –
Staghorn Sumac Tiger Eyes®
and Laceleaf
• Tiger Eyes - bright lime-green
to yellow foliage, grows 6-7’
tall;
• Both have excellent fall color
• Fruits colorful and attract
wildlife. Plants sucker forming
dense thickets; great for
naturalization and banks for
erosion control
Tiger Eyes®
Future Selections
2014

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

CC – Heptacodium miconioides,
Seven-son-flower
Tree – Chilopsis linearis, Desert
Willow
Shrub - Viburnum dentatum ‘Blue
Muffin’
Perennial – Panicum virgatum
‘Heavy Metal,’ Northwind,’ and
‘Shenandoah’
Annual - Juncus effusus ‘Big
Twister’, Corkscrew Rush
2015





CC – Nyssa sylvatica, Black Gum
(new improved cultivars)
Tree – Acer campestre, Hedge
Maple
Shrub – Berberis, pillar series –
Helmond Pillar, Sunjoy Gold Pillar,
Golden Rocket, Orange Rocket
Perennial – Phlox ‘Volcano’ series
Annual – Cleome hassleriana,
spider flower (improved varieties)