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1999-2019 Photos

  • Vanderwolf Pyramid, Limber Pine - 2019 Pinus flexilis
    Vanderwolf Pyramid, Limber Pine
    2019 Pinus flexilis
  • Vanderwolf Pyramid, Limber Pine - 2019 Pinus flexilis
    Vanderwolf Pyramid, Limber Pine
    2019 Pinus flexilis
  • Double Take™ series, Flowering Quince - 2019 Chaenomeles speciosa
    Double Take™ series, Flowering Quince
    2019 Chaenomeles speciosa
  • Double Take™ series, Flowering Quince - 2019 Chaenomeles speciosa
    Double Take™ series, Flowering Quince
    2019 Chaenomeles speciosa
  • Rattlesnake Master - 2019 Eryngium yuccifolium
    Rattlesnake Master
    2019 Eryngium yuccifolium
  • Rattlesnake Master - 2019 Eryngium yuccifolium
    Rattlesnake Master
    2019 Eryngium yuccifolium
  • Graffiti® series, Star Flower - 2019 Pentas lanceolata
    Graffiti® series, Star Flower
    2019 Pentas lanceolata
  • Graffiti® series, Star Flower - 2019 Pentas lanceolata
    Graffiti® series, Star Flower
    2019 Pentas lanceolata
  • Graffiti® series, Star Flower - 2019 Pentas lanceolata
    Graffiti® series, Star Flower
    2019 Pentas lanceolata
  • Japanese Zelkova - 2018 Zelkova serrata 'Schmidtlow Wireless'
    Japanese Zelkova
    2018 Zelkova serrata 'Schmidtlow Wireless'
  • Japanese Zelkova - 2018 Zelkova serrata 'Musashino'
    Japanese Zelkova
    2018 Zelkova serrata 'Musashino'
  • Japanese Zelkova - 2018 Zelkova serrata 'Ogon'
    Japanese Zelkova
    2018 Zelkova serrata 'Ogon'
  • Bush Clover 'Gibraltar' - 2018 Lespedeza thunbergii subsp. thunbergii
    Bush Clover 'Gibraltar'
    2018 Lespedeza thunbergii subsp. thunbergii
  • Bush Clover ‘Gibraltar’ - 2018 Lespedeza thunbergii subsp. thunbergii
    Bush Clover ‘Gibraltar’
    2018 Lespedeza thunbergii subsp. thunbergii
  • Indian pink - 2018 Spigelia marilandica
    Indian pink
    2018 Spigelia marilandica
  • Indian pink - 2018 Spigelia marilandica
    Indian pink
    2018 Spigelia marilandica
  • Supertunia® Vista Bubblegum® - 2018 Petunia 'Ustuni6001'
    Supertunia® Vista Bubblegum®
    2018 Petunia 'Ustuni6001'
  • Supertunia® Vista Bubblegum® - 2018 Petunia 'Ustuni6001'
    Supertunia® Vista Bubblegum®
    2018 Petunia 'Ustuni6001'
  • Chinese Date - 2017 Ziziphus jujuba
    Chinese Date
    2017 Ziziphus jujuba
  • Ziziphus Fruit - 2017 Chinese Date
    Ziziphus Fruit
    2017 Chinese Date
  • Fringetree - 2017 Chionanthus cultivars
    Fringetree
    2017 Chionanthus cultivars
  • Fringetree - 2017 Chionanthus Virginicus
    Fringetree
    2017 Chionanthus Virginicus
  • Chioanthus - 2017 virgincus
    Chioanthus
    2017 virgincus
  • Chionanthus Fruit - 2017 Chionanthus
    Chionanthus Fruit
    2017 Chionanthus
  • Dwarf Palmetto - 2017 Sabal minor
    Dwarf Palmetto
    2017 Sabal minor
  • Dwarf Palmetto - 2017 Sabal minor
    Dwarf Palmetto
    2017 Sabal minor
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Firecracker Flower - 2017 Crossandra infundibuliformis
    Firecracker Flower
    2017 Crossandra infundibuliformis
  • Firecracker Flower - 2017 Crossandra infindibuliformis
    Firecracker Flower
    2017 Crossandra infindibuliformis
  • Firecracker Flower Red - 2017 Crossandra infindibuliformis
    Firecracker Flower Red
    2017 Crossandra infindibuliformis
  • Deciduous Cultivars - 2016 Magnolia
    Deciduous Cultivars
    2016 Magnolia
  • Magnolia - 2016 Elizabeth
    Magnolia
    2016 Elizabeth
  • Magnolia - 2016 Elizabeth
    Magnolia
    2016 Elizabeth
  • Deciduous Cultivars - 2016 Magnolia
    Deciduous Cultivars
    2016 Magnolia
  • Escarpment Oak - 2016 Quercus fusiformis
    Escarpment Oak
    2016 Quercus fusiformis
  • Escarpment Live Oak - 2016 Acorn
    Escarpment Live Oak
    2016 Acorn
  • Yucca - 2016 Yucca filamentosa
    Yucca
    2016 Yucca filamentosa
  • Color Guard Yacca - 2016 Yucca filamentosa
    Color Guard Yacca
    2016 Yucca filamentosa
  • Sedge - 2016 Carex species
    Sedge
    2016 Carex species
  • Sedge - 2016 Carex species
    Sedge
    2016 Carex species
  • Vinca - 2016 Catharanthus
    Vinca
    2016 Catharanthus
  • Vinca - 2016 Catharanthus
    Vinca
    2016 Catharanthus
  • Vinca - 2016 Catharanthus
    Vinca
    2016 Catharanthus
  • Black Gum - 2015 Nyssa sylvatica
    Black Gum
    2015 Nyssa sylvatica
  • Hedge Maple - 2015 Acer campestre
    Hedge Maple
    2015 Acer campestre
  • Barberry - 2015 Berberis thunbergii
    Barberry
    2015 Berberis thunbergii
  • Volcano Phlox - 2015 Phlox paniculata
    Volcano Phlox
    2015 Phlox paniculata
  • Spider Flower - 2015 Cleome hybrids
    Spider Flower
    2015 Cleome hybrids
  • Seven-son-flower - 2014 Heptacodium miconioides
    Seven-son-flower
    2014 Heptacodium miconioides
  • Seven-son-flower - 2014 Heptacodium miconioides
    Seven-son-flower
    2014 Heptacodium miconioides
  • Desert-willow cultivars - 2014 Chilopsis liners
    Desert-willow cultivars
    2014 Chilopsis liners
  • Desert-willow cultivars - 2014 Chilopsis Flower
    Desert-willow cultivars
    2014 Chilopsis Flower
  • ‘Christom’  Blue Muffin® - 2014 Viburnum dentatum
    ‘Christom’ Blue Muffin®
    2014 Viburnum dentatum
  • ‘Christom’ Blue Muffin® Fruit - 2014 Viburnum dentatum
    ‘Christom’ Blue Muffin® Fruit
    2014 Viburnum dentatum
  • Switch Grass - 2014 Panicum virgatum cultivars
    Switch Grass
    2014 Panicum virgatum cultivars
  • 'Big Twister' Corkscrew Rush - 2014 Juncus effusus 'Big Twister'
    'Big Twister' Corkscrew Rush
    2014 Juncus effusus 'Big Twister'
  • Fruit Collection - 2013 Fruit Collection
    Fruit Collection
    2013 Fruit Collection
  • Fruit Collection - 2013 Fruit Collection
    Fruit Collection
    2013 Fruit Collection
  • Winterberry Euonymus - 2013 Euonymus bungeanus
    Winterberry Euonymus
    2013 Euonymus bungeanus
  • Winterberry Fruit - 2013 Winterberry Fruit
    Winterberry Fruit
    2013 Winterberry Fruit
  • Chaste Tree - 2013 Vitex
    Chaste Tree
    2013 Vitex
  • Chaste Tree Flower - 2013 Chaste Tree Flower
    Chaste Tree Flower
    2013 Chaste Tree Flower
  • ‘Walker’s Low’  Catmint  - 2013 Nepeta x faassenii
    ‘Walker’s Low’ Catmint
    2013 Nepeta x faassenii
  • Dakota Gold - 2013 Helenium 'Dakota Gold'
    Dakota Gold
    2013 Helenium 'Dakota Gold'
  • Dakota Gold - 2013 Dakota Gold
    Dakota Gold
    2013 Dakota Gold
  • Tiger Eye - 2012 Rhus typhina
    Tiger Eye
    2012 Rhus typhina
  • Chinkapin Oak - 2012 Chinkapin Oak
    Chinkapin Oak
    2012 Chinkapin Oak
  • Juniper 'Taylor' - 2012 Juniperus virginiana 'Tylor'
    Juniper 'Taylor'
    2012 Juniperus virginiana 'Tylor'
  • Icee Blue - 2012 J. horizontalis 'Monber'
    Icee Blue
    2012 J. horizontalis 'Monber'
  • 'Saybrook Gold' - 2012 J. chinensis 'Saybrook Gold'
    'Saybrook Gold'
    2012 J. chinensis 'Saybrook Gold'
  • Arkansas Bluestar - 2012 Amsonia hubrichtii
    Arkansas Bluestar
    2012 Amsonia hubrichtii
  • Arkansas Bluestar - 2012 Amsonia hubrichtii
    Arkansas Bluestar
    2012 Amsonia hubrichtii
  • Arkansas Bluestar - 2012 Amsonia hubrichtii
    Arkansas Bluestar
    2012 Amsonia hubrichtii
  • Magilla™ Perilla - 2012 Perilla frutescens
    Magilla™ Perilla
    2012 Perilla frutescens
  • Silver Linden - 2011 Titia tomentosa
    Silver Linden
    2011 Titia tomentosa
  • Silver Linden - 2011 Tilia tomentosa
    Silver Linden
    2011 Tilia tomentosa
  • 'New Harmony' American Elm - 2011 Ulmus americana
    'New Harmony' American Elm
    2011 Ulmus americana
  • Little Richard - 2011 Abelia x grandiflora
    Little Richard
    2011 Abelia x grandiflora
  • Kaleidoscope - 2011 Abelia x grandiflora
    Kaleidoscope
    2011 Abelia x grandiflora
  • Rose Creek' Abeia - 2011 Abelia
    Rose Creek' Abeia
    2011 Abelia
  • Giant Coneflower - 2011 Rudbeckia maxima
    Giant Coneflower
    2011 Rudbeckia maxima
  • Giant Coneflower - 2011 Rudbeckia maxima
    Giant Coneflower
    2011 Rudbeckia maxima
  • Pink Crystal Ruby Grass - 2011 Melinus nerviglumis 'Savannah'
    Pink Crystal Ruby Grass
    2011 Melinus nerviglumis 'Savannah'
  • Pink Crystals Ruby Grass - 2011 Melinus nerviglumis
    Pink Crystals Ruby Grass
    2011 Melinus nerviglumis
  • 'Caddo' Sugar Maple - 2010 Acer saccharum 'Caddo'
    'Caddo' Sugar Maple
    2010 Acer saccharum 'Caddo'
  • Indian Cherry - 2010 Rhamuns carolinians
    Indian Cherry
    2010 Rhamuns carolinians
  • Koreanspice Viburnum - 2010 Viburnum carlesii
    Koreanspice Viburnum
    2010 Viburnum carlesii
  • Toad Lily - 2010 Tricyrtis hirta
    Toad Lily
    2010 Tricyrtis hirta
  • Silver Falls Dichondra - 2010 Dichondra argentea
    Silver Falls Dichondra
    2010 Dichondra argentea
  • Persian Parrotia - 2009 Parrotia persica
    Persian Parrotia
    2009 Parrotia persica
  • Parrotia Bark - 2009 Persian Parrotia Bark
    Parrotia Bark
    2009 Persian Parrotia Bark
  • Arizona Cypress - 2009 Cupressus arizonica
    Arizona Cypress
    2009 Cupressus arizonica
  • Cyress Bark - 2009 Arizona Cyress Bark
    Cyress Bark
    2009 Arizona Cyress Bark
  • Chokebeery - 2009 Aronia
    Chokebeery
    2009 Aronia
  • Chokebeery Fruit - 2009Chokebeery Fruit
    Chokebeery Fruit
    2009Chokebeery Fruit
  • Mexican Feather Grass - 2009 Nassella tenuissima
    Mexican Feather Grass
    2009 Nassella tenuissima
  • Diamond Frost Euphorbia - 2009 Euphorbia 'Inneuphdia'
    Diamond Frost Euphorbia
    2009 Euphorbia 'Inneuphdia'
  • Bosnian Pine - 2008 Pinus heldreichii
    Bosnian Pine
    2008 Pinus heldreichii
  • American Beautyberry - 2008 Callicarpa americana
    American Beautyberry
    2008 Callicarpa americana
  • Hellebore - 2008 Helleborus
    Hellebore
    2008 Helleborus
  • Spilanthes - 2008 Acmella oleracea 'Peek-A-Boo'
    Spilanthes
    2008 Acmella oleracea 'Peek-A-Boo'
  • Oklahoma Redbud - 2007 Cercis canadensis var. texensis
    Oklahoma Redbud
    2007 Cercis canadensis var. texensis
  • Southern Waxmyrtle - 2007 Myrica cerifera
    Southern Waxmyrtle
    2007 Myrica cerifera
  • Evening Primrose - 2007 Oenothera macrocarpa
    Evening Primrose
    2007 Oenothera macrocarpa
  • Blanket Flower - 2007 Gaillardia
    Blanket Flower
    2007 Gaillardia
  • ‘Prairifire’ Crabapple - 2006 Malus ' Prairifire'
    ‘Prairifire’ Crabapple
    2006 Malus ' Prairifire'
  • Diabolo® Ninebark - 2006 Physocarpus opulifolius 'Monlo'
    Diabolo® Ninebark
    2006 Physocarpus opulifolius 'Monlo'
  • 'Golden Jubilee' Anise Hyssop - 2006 Agastache foeniculum 'Golden Jubilee'
    'Golden Jubilee' Anise Hyssop
    2006 Agastache foeniculum 'Golden Jubilee'
  • Wishbone Flower - 2006 Torenia fournirez
    Wishbone Flower
    2006 Torenia fournirez
  • Cedar Elm - 2005 Ulmus crassifolia
    Cedar Elm
    2005 Ulmus crassifolia
  • Cedar Elm - 2005 Ulmus crassifolia
    Cedar Elm
    2005 Ulmus crassifolia
  • Crossvine - 2005 Bignonia capreolata
    Crossvine
    2005 Bignonia capreolata
  • Perennial Plumbago - 2005 Ceratostigma plumbaginoides
    Perennial Plumbago
    2005 Ceratostigma plumbaginoides
  • Summer Snapdragon - 2005 Angelonia angustifolia
    Summer Snapdragon
    2005 Angelonia angustifolia
  • Shantung Maple - 2004 Acer truncatum
    Shantung Maple
    2004 Acer truncatum
  • Winter Jasmine - 2004 Jasminum nudiflorum
    Winter Jasmine
    2004 Jasminum nudiflorum
  • Autumn Sage - 2004 Salvia greggii 'Pink Perfernce'
    Autumn Sage
    2004 Salvia greggii 'Pink Perfernce'
  • Firebush - 2004 Hamelia patens
    Firebush
    2004 Hamelia patens
  • Kentucky Coffee Tree - 2003 Gymnocladus dioica
    Kentucky Coffee Tree
    2003 Gymnocladus dioica
  • Pink Velour® Crape Myrtle - 2003 Lagerstroemia indica 'Whit III'
    Pink Velour® Crape Myrtle
    2003 Lagerstroemia indica 'Whit III'
  • Japanese Painted Fern - 2003 Athyrium nipponicum
    Japanese Painted Fern
    2003 Athyrium nipponicum
  • Yellow Bells - 2003 Tecoma stans
    Yellow Bells
    2003 Tecoma stans
  • Bur Oak - 2002 Quercus macrocarpa
    Bur Oak
    2002 Quercus macrocarpa
  • Japanese Kerria - 2002 Kerria japonica
    Japanese Kerria
    2002 Kerria japonica
  • 'Magnus' Purple Coneflower - 2002 Echinacea purpurea 'Magnus'
    'Magnus' Purple Coneflower
    2002 Echinacea purpurea 'Magnus'
  • 'Margarita' Sweet Potato - 2002 Echinacea purpurea 'Margarita'
    'Margarita' Sweet Potato
    2002 Echinacea purpurea 'Margarita'
  • Shumard Oak - 2001 Quercus shumardii
    Shumard Oak
    2001 Quercus shumardii
  • Deciduous Holly - 2001 Ilex decidua
    Deciduous Holly
    2001 Ilex decidua
  • 'Siskiyou Pink' Gaura - 2001 Gaura lindheimeri 'Siskiyou Pink'
    'Siskiyou Pink' Gaura
    2001 Gaura lindheimeri 'Siskiyou Pink'
  • Mexican Zinnia - 2001 Zinnia angustifolia
    Mexican Zinnia
    2001 Zinnia angustifolia
  • Bald Cypress - 2000 Taxodium distichum
    Bald Cypress
    2000 Taxodium distichum
  • 'Magic Carpet' Spirea - 2000 Spiraea japonica 'Magic Carpet
    'Magic Carpet' Spirea
    2000 Spiraea japonica 'Magic Carpet
  • 'Homestead Purple' Verbena - 2000 Verbena canadensis 'Homestead Purple'
    'Homestead Purple' Verbena
    2000 Verbena canadensis 'Homestead Purple'
  • Fan Flower - 2000 Scaevola aemula
    Fan Flower
    2000 Scaevola aemula
  • Chinese Pistache - 1999 Pistacia chinensis
    Chinese Pistache
    1999 Pistacia chinensis
  • Oakleaf Hydrangea - 1999 Hydrangea quercifolia
    Oakleaf Hydrangea
    1999 Hydrangea quercifolia
  • 'Powis Castle' - 1999 Artemisia 'Powis Castle'
    'Powis Castle'
    1999 Artemisia 'Powis Castle'
  • Purple Fountain Grass - 1999 Pennisetum setaceum
    Purple Fountain Grass
    1999 Pennisetum setaceum

Oklaoma Proven! logo.jpg

 

Oklahoma Proven is a plant promotion program coordinated by faculty in the Department of Horticulture and Landscape Architecture at Oklahoma State University. The goal of the program is to recommend plants well-adapted for use across Oklahoma.

 

 

 

Perennial for 2019

Rattlesnake Master

Eryngium yuccifolium

Rattlesnake Master is a native species to the tall grass prairies. Leaves of rattlesnake master are parallel-veined, bristly-edged, sword-shaped, medium green leaves (to 3' long) resembling those of yucca. Flowers are greenish-white and tightly packed into globular, 1" diameter heads resembling thistles. The flowering heads attract many kinds of insects

Rattlesnake master prefers dryish, sandy soils, but tolerates clay and shallow-rocky soils. Plants tend to open up and flop in overly fertile soils or in anything less than full sun. This is a taprooted plant which transplants poorly and is best left undisturbed once established.

Use rattlesnake master in a xeriscape garden, perennial border, or native garden. Group plants in naturalized areas for best affect.

  • Exposure: Sun, part shade
  • Soil: Tolerates about any soil
  • Hardiness: USDA Zone 4-10

 

 

 

Perennial for 2018

Indian Pink

Spigelia marilandica

Indian pink, also called woodland pinkroot and pinkroot, is a native species to the Southeastern U.S. It is an excellent plant for shady gardens. Indian pink is an upright, multi-stemmed clump forming perennial 1-2 feet tall and 1 ½ feet wide with bright, glossy green leaves. Numerous flowers appear in late spring/early summer and are tubular, deep red with a contrasting yellow throat that flares at the tip to form five pointed lobes (a yellow star). Indian Pink grows in part shade to full shade in moist soils, but does really well in full sun and is quite drought tolerant once established.

Use Indian pink in a woodland garden, perennial border, rain garden, or native garden. Hummingbirds and butterflies are attracted to the beautiful, tubular flowers.

  • Exposure: Sun, part shade
  • Soil: Moist or dry soils
  • Hardiness: USDA Zone 5-9

 

 

 

Perennial for 2017

Milkweed

Asclepias species

Asclepias species are the milkweeds. Native to America they are well adapted to many soil types. Best known as the host plant for monarch butterflies, the milkweeds have gained a lot of attention lately and efforts across the country to reestablish lost habitat to help save the declining monarch population is taking the front stage for gardeners, butterfly enthusiasts, and conservationists. Butterfly milkweed, Asclepias tuberosa, is the most popular of Asclepias species with bright orange to yellow-orange flowers on upright stems growing 1 to 3 feet tall. In fact, butterfly milkweed has been named the Perennial of the Year in 2017 by the Perennial Plant Association. Milkweeds in general grow in average, dry to medium, well-drained soils in full sun and are very drought tolerant and have no serious pest problems. Grow in native plant gardens, wild gardens, meadows, naturalized areas, perennial borders, and cottage style gardens.

  • Exposure: Sun, part shade
  • Soil: Tolerates about any soil
  • Hardiness: USDA Zone 4-10
2017 Asclepias

 

 

 

Perennial for 2016

Sedges

Carex species

Sedges belong to the genus Carex, which is a genus of many species, most from wet areas such as bogs. Sedges have triangular, grass-like stems and panicles of short flower spikes. Foliage can be evergreen or deciduous and colors range from green, brown/rust, golden, blue, to variegated. Sedges are grown in groups or masses, as a lawn substitute, in naturalized areas, perennial borders, and habitat restoration. They are grown particularly in shady areas where the variegated varieties really shine. Some require damp or wet conditions while others are relatively drought tolerant.

  • Exposure: Full sun to part or full shade
  • Soil: Dry to wet soils
  • Hardiness: USDA Zone 3-10

 

 

 

Perennial for 2015

Volcano® series, Garden Phlox

Phlox paniculata

Phlox Volcano® is more compact, fragrant, and powdery mildew tolerant than other garden phlox types. Plants develop sturdy stems, 24-28” tall, with deep green leaves and an abundance of large flowers that appear from June to September if plants are cut back after initial bloom. Flower colors range from red, pink, ruby, white, lavender, and purple; flowers may also have eyes of pink, red, or white or are bicolored such as with Lilac Splash. It doesn’t mind most soils, but needs well drained soil; irrigate with soaker or drip irrigation to keep foliage dry. Full sun is the best exposure for Volcano phlox, but it will grow in part shade; too much shade and poor air circulation increases chances of mildew developing, though it still does not seem to inhibit flowering. Once established, phlox is very adaptable. It is grown as an accent, in groups, or masses. It also works well in native plant gardens, wild gardens, meadows, naturalized areas, perennial borders, and cottage style gardens. Butterflies and hummingbirds are attracted to the colorful, fragrant flowers.

  • Exposure: Sun, part shade
  • Soil: Tolerates about any soil
  • Hardiness: USDA Zone 4-10

 

 

 

Perennial for 2014

Switchgrass

Panicum virgatum cultivars

Switchgrass is native throughout North America and is a dominant species of the tallgrass prairies. It doesn’t mind most soils and actually grows well in wet and dry locations. Full sun is the best exposure for switchgrass, but it will grow in part shade; too much shade or rich soils may result in floppy plants. Switchgrass is a warm-season perennial, growing largely as a bunchgrass 3 to 6 feet tall, but may spread by rhizomes or self-seeding. Switchgrass has an upright, stiff form overall. Flower panicles are open, lacy sprays, with a purplish tint that persist into the winter. Leaf color is generally medium green turning yellow, sometimes with orange tints, in fall; however, several cultivars exist – ‘Heavy Metal’, has metallic-blue foliage, ‘Northwind’ is bluish-green, ‘Shenandoah’ has foliage with dark purple tips, and ‘Cheyenne Sky’ turns wine red. Winter color is tan to beige. Once established, switchgrass is very drought tolerant. It is grown as an accent, in groups or masses and can be effective as a screen. It also works well in native plant gardens, wild gardens, meadows, naturalized areas, as well as rain, water, and bog gardens.

  • Exposure: Sun, part shade
  • Soil: Tolerates about any soil
  • Hardiness: USDA Zone 5-9

 

 

 

Perennial for 2013

Catmint

Nepeta x faassenii 'Walker Low's'

Walker’s Low Catmint was the Perennial Plant of the Year in 2007 and is an easy to grow, pest free perennial. This hybrid Nepeta develops into a mound of aromatic, grayish green foliage. Lavender-blue flowers appear in spring and continue to bloom if properly pruned by trimming after initial flowering. Walker’s Low grows 1 to 2 feet high and 1 ½ to 3 feet wide and can be used as edging or in a border, herb or rock garden, naturalized area, as groundcover, or is quite attractive spilling over the edge of a wall. Nepeta attracts bees and butterflies. It also tolerates some shade, dry, rocky soil, and is quite drought and deer resistant.

  • Exposure: Sun, part shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 3-8

 

 

 

Perennial for 2012

Arkansas Bluestar

Amsonia hubrichtii

Arkansas bluestar is native to eastern Oklahoma and Arkansas, but does well throughout the state. It is tolerant of moist soils and is quite drought tolerant once established. Flowers are sky blue, star shaped and develop in clusters at the end of each branch in early spring. Leaves are needle-like on upright stems that sway in the breeze providing a soft, wispy appearance; foliage is bright green in summer and then in fall, seemingly overnight, it explodes to a golden yellow. Amsonia grows to 3 feet high. Plant in masses for best effect. Can be used in mixed borders, meadows, native gardens, and open woods.

  • Exposure: Sun, part shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 4-9

 

 

 

Perennial for 2011

Giant Coneflower

Rudbeckia maxima

Giant coneflower is native to eastern Oklahoma, but does well throughout the state. It is tolerant of moist soils and is quite drought tolerant once established. Giant coneflower has silvery-blue foliage. Flowers have bright yellow ray flowers that dangle from a large, upright, dark brown cone on stems that reach 5-6 feet high. Giant coneflower blooms in early summer but deadheading the spent blossoms will encourage another flush of blooms in late summer. Plant in masses for best effect. Can be used in mixed borders, meadows, native gardens, and open woods. This species makes a strong vertical statement in the landscape.

  • Exposure: Sun, part shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 4-8

 

 

 

Perennial for 2010

Toad Lily

Tricyrtis hirta

Toad lilies are known for their very unique flowers. Flowers are pale lilac with dark purple spots that appear on upright arching stems late summer to early fall when many other plants are beginning to wind down. Though flowers are quite unique, they are small so place toad lily in a spot where the flowers can be appreciated up close. The plant grows 2’ to 3’ high and about 2’ wide with bright green leaves. They are excellent for the woodland garden as understory plants where they will be protected by shade. Toad lily is easy to grow, resistant to deer, somewhat drought tolerant, but grow best in moist soils and will even tolerate wet conditions. Several cultivars with varying flower colors are available.

  • Exposure: Shade, partial shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 4-8

 

 

 

Perennial for 2009

Mexican Feather Grass

Nassella tenuissima

Mexican feather grass is a fine textured clumping perennial that waves its silvery flowers in the slightest breeze. It is drought tolerant and tough despite its refined appearance and forms a clump almost two feet tall and three feet wide as the leaves arch to the sides. It tolerates a wide variety of conditions, but prefers well-drained soils and does not like to be cut to the ground in spring like other grasses. Remove only the top third of the plant to rejuvenate. It is native to prairies in Texas, New Mexico, and south to central Mexico and may reseed in the garden.

  • Exposure: Full sun to part shade
  • Soil: Well-drained
  • Hardiness: USDA Zone 7

 

 

 

Perennial for 2008

Hellebore

Helleborus

Hellebores, also known as Lenten Rose, belong to a genus of mostly evergreen herbaceous plants that are prized for their ability to flower in late winter. The flower stalks rise out of the leaf litter or through the snow to display nodding flowers that range in color from green to white, yellow, or even purple with some cultivars producing spotted flowers. Recently hybrids have been selected for outward-facing flowers and brighter colors increasing their garden value. Hellebores are tough plants requiring little special care other than shade and pruning of old foliage. They are excellent for the woodland garden as understory plants where they will be protected by shade.

  • Exposure: Shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 6

 

 

 

Perennial for 2007

Evening Primrose

Oenothera macrocarpa 'Comanche Campfire'

This species of Evening Primrose is native to western Oklahoma and ‘Comanche Campfire’ was selected for its ability to produce beautiful yellow flowers above red petioles and silver foliage. It is touted as a xeriscape perennial since it thrives in well-drained soil and, once established, requires little moisture. As a low-growing, clumping perennial, ‘Comanche Campfire’ reaches a height of 15 to 18 inches and spreads to two feet. Use it in a rock garden or along the edge of a perennial bed.

  • Exposure: Full sun
  • Soil: Well-drained
  • Hardiness: USDA Zone 4

 

 

 

Perennial for 2006

Golden Jubilee Anise Hyssop

Agastache foeniculum 'Golden Julibee'

‘Golden Jubilee’ is a cultivar of the North American native commonly known as anise hyssop. It was selected for its chartreuse foliage, was named to commemorate HM Queen Elizabeth II’s golden jubilee, and was the 2003 All-America Selections flower award winner. Reaching 2' tall and 1' wide, ‘Golden Jubilee’ produces light purple flower spikes from early summer to fall. Although a perennial, it will reseed in your garden and the new plants will also be golden. As an added bonus, brushing against the foliage releases the plant’s licorice scent.

  • Exposure: Full sun
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 6

 

 

 

Perennial for 2005

Perennial Plumbago

Ceratostigma plumbaginoides

Perennial plumbago is a neat, well-behaved plant that grows 8" to 12" high and spreads to 18" making it welcome at the front of a mixed border or massed as a ground cover. The terminal clusters of blue flowers appear from summer through fall when the foliage turns a bronze-red before going dormant for the winter. It is best to use perennial plumbago in a well-drained soil and to cut old stems to the ground each spring for vigorous re-growth.

  • Exposure: Partial shade to full sun
  • Soil: Well-drained
  • Hardiness: USDA Zone 5

 

 

 

Perennial for 2004

Autumn Sage

Salvia greggii 'Pink Prefernce'

‘Pink Preference’ is a cultivar of Autumn Sage that was selected for its bright pink flowers. Like the species, it is a heat and drought tolerant perennial that starts blooming in the spring but blooms most in the autumn as other flowers in the garden start to fade. It forms a two to three foot mound and attracts hummingbirds and butterflies to the garden. Pruning to six inches high each spring will help keep Autumn Sage dense and full.

  • Exposure: Full
  • Soil: Well-drained
  • Hardiness: USDA Zone 6

 

 

 

Perennial for 2003

Japanese Painted Fern

Athyrium nipponicum

Japanese Painted Fern is a deciduous perennial growing to twelve inches tall. It can be used in shaded perennial gardens or massed as a ground cover. Cultivars are available, each with its own pattern of red and silver variegation.

  • Sun Exposure: Part to full shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 4

 

 

 

Perennial for 2002

Magnus Purple Coneflower

Echinacea purpurea 'Magnus'

Magnus Purple Coneflower is known for its rose-colored flowers that appear in early summer and sporadically until frost. Magnus is a clump forming perennial that grows to 2 - 3 feet tall. Use this heat and drought tolerant perennial in a native plant garden, perennial border, or as a cut flower.

  • Sun Exposure: Full sun to light shade
  • Soil: Well-drained
  • Hardiness: USDA Zone 3

 

 

 

Perennial for 2001

Siskiyou Pink Gaura

Gaura lindheimeri 'Siskiyou Pink'

Gaura is a drought-tolerant perennial that thrives in the heat and humidity of the South. Although the species produces white flowers, the cultivar ‘Siskiyou Pink’ has bright pink flowers that appear on airy, 3- to 4-foot-tall sprays early in the spring. Blooming will continue until fall if old flower spikes are removed.

  • Sun Exposure: Full sun to partial shade
  • Soil: Well-drained
  • Hardiness: USDA Zone 5

 

 

 

Perennial for 2000

Homestead Purple Verbena

Verbena canadensis 'Homestead Purple'

Homestead Purple’s deep purple flowers and trailing habit make it perfect for hanging baskets, as a ground cover, or as the foreground of a mixed border. This North American native will bloom from spring to frost, slowing down only slightly during the hottest months.

  • Sun exposure: Full
  • Soil: Moist, well-drained
  • Hardiness: USDA Zone 4

 

 

 

Perennial for 1999

Powis Castle

Artemisia 'Powis Castle'

With dense mounds of lacy silver foliage, this perennial reaches a height of 3’ and remains evergreen during mild winters. It is prized for its feathery foliage and its drought tolerance.

  • Sun Exposure: Full sun to part shade
  • Soil: Well-drained
  • Hardiness: USDA Zone 5