You are here: Home / Photos / Perennial

Perennial

  • Golden Variegated Sweet Flag - 2020 Acorus gramineus ‘Ogon’
    Golden Variegated Sweet Flag
    2020 Acorus gramineus ‘Ogon’
  • Golden Variegated Sweet Flag - 2020 Acorus gramineus ‘Ogon’
    Golden Variegated Sweet Flag
    2020 Acorus gramineus ‘Ogon’
  • Rattlesnake Master - 2019 Eryngium yuccifolium
    Rattlesnake Master
    2019 Eryngium yuccifolium
  • Rattlesnake Master - 2019 Eryngium yuccifolium
    Rattlesnake Master
    2019 Eryngium yuccifolium
  • Indian pink - 2018 Spigelia marilandica
    Indian pink
    2018 Spigelia marilandica
  • Indian pink - 2018 Spigelia marilandica
    Indian pink
    2018 Spigelia marilandica
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Milkweed - 2017 Asclepias
    Milkweed
    2017 Asclepias
  • Sedge - 2016 Carex species
    Sedge
    2016 Carex species
  • Sedge - 2016 Carex species
    Sedge
    2016 Carex species
  • Volcano Phlox - 2015 Phlox paniculata
    Volcano Phlox
    2015 Phlox paniculata
  • Switch Grass - 2014 Panicum virgatum cultivars
    Switch Grass
    2014 Panicum virgatum cultivars
  • ‘Walker’s Low’  Catmint  - 2013 Nepeta x faassenii
    ‘Walker’s Low’ Catmint
    2013 Nepeta x faassenii
  • 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
  • Giant Coneflower - 2011 Rudbeckia maxima
    Giant Coneflower
    2011 Rudbeckia maxima
  • Giant Coneflower - 2011 Rudbeckia maxima
    Giant Coneflower
    2011 Rudbeckia maxima
  • Toad Lily - 2010 Tricyrtis hirta
    Toad Lily
    2010 Tricyrtis hirta
  • Mexican Feather Grass - 2009 Nassella tenuissima
    Mexican Feather Grass
    2009 Nassella tenuissima
  • Hellebore - 2008 Helleborus
    Hellebore
    2008 Helleborus
  • Evening Primrose - 2007 Oenothera macrocarpa
    Evening Primrose
    2007 Oenothera macrocarpa
  • 'Golden Jubilee' Anise Hyssop - 2006 Agastache foeniculum 'Golden Jubilee'
    'Golden Jubilee' Anise Hyssop
    2006 Agastache foeniculum 'Golden Jubilee'
  • Perennial Plumbago - 2005 Ceratostigma plumbaginoides
    Perennial Plumbago
    2005 Ceratostigma plumbaginoides
  • Autumn Sage - 2004 Salvia greggii 'Pink Perfernce'
    Autumn Sage
    2004 Salvia greggii 'Pink Perfernce'
  • Japanese Painted Fern - 2003 Athyrium nipponicum
    Japanese Painted Fern
    2003 Athyrium nipponicum
  • 'Magnus' Purple Coneflower - 2002 Echinacea purpurea 'Magnus'
    'Magnus' Purple Coneflower
    2002 Echinacea purpurea 'Magnus'
  • 'Siskiyou Pink' Gaura - 2001 Gaura lindheimeri 'Siskiyou Pink'
    'Siskiyou Pink' Gaura
    2001 Gaura lindheimeri 'Siskiyou Pink'
  • 'Homestead Purple' Verbena - 2000 Verbena canadensis 'Homestead Purple'
    'Homestead Purple' Verbena
    2000 Verbena canadensis 'Homestead Purple'
  • 'Powis Castle' - 1999 Artemisia 'Powis Castle'
    'Powis Castle'
    1999 Artemisia 'Powis Castle'

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.

 


Collector's Choice for 2009

Persian Parrotia

Parrotia persica

Persian Parrotia is a small tree reaching only 20 to 30’ tall and can spread almost as wide. Interesting deep-maroon flowers appear in late winter. Leaves have a reddish color when appearing in spring, change to a lustrous green in summer, and can be a brilliant yellow or orange in fall. As the tree ages the bark exfoliates into patches of green, cream, and gray adding to the year-round interest of this tree. It is very heat and drought tolerant once established but appreciates some protection from the afternoon sun.

  • Exposure: Light shade
  • Soil: Moist, well-drained
  • Hardiness: USDA Hardiness Zone 5

 

 

Tree for 2009

Arizona Cypress

Cupressus arizonica

Arizona cypress is a drought tolerant, evergreen tree native to the southwestern United States. In the landscape it usually reaches a height of only 20’ to 25’ and 15’ wide. The foliage can be a gray-green but usually blue-foliage and recently yellow foliage forms are available in the trade. ‘Blue Ice’ and ‘Carolina Sapphire’ are common cultivars and ‘Cookes Peak’ is a selection from Cookes Peak, New Mexico with silvery-blue foliage and pyramidal form (see photograph). Arizona cypress require well-drained soil and thrive in hot, dry environments. As the tree ages, the bark exfoliates beautifully becoming mottled with patches of burnt orange and green.

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

 

 

 

Shrub for 2009

Chokeberry

Aronia

There are two species of importance in the genus Aronia, Red Chokeberry (Aronia arbutifolia) and Black Chokeberry (Aronia melanocarpa). As their common names suggest, fruit color is the major difference between the two. Both produce clusters of white flowers in spring, have excellent red fall foliage, grow about 10’ high, and thrive in almost any soil type. ‘Brilliantissima’ is a popular cultivar of Red Chokeberry, chosen for its more compact size and abundance of red fruit. Both species are excellent wildlife plants, but Black Chokeberry gets a lot of attention as a “super fruit” for its high levels of antioxidants and can be used to make juice, jelly, or wine. Aronia work well massed in naturalized settings or at the back of a border since the stems are usually bare near the base leaving room for garden perennials.

  • Exposure: Sun to part shade
  • Soil: Tolerant of most soils
  • Hardiness: USDA Zone 4

 

 

 

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

 

 

 

Annual for 2009

Diamond Frost® Euphorbia

Euphorbia 'Inneuphdia'

Euphorbia is a fine-textured mounding plant used as an annual in Oklahoma. The simple white flowers bloom from spring until first frost and the plant forms a 2’ to 3’ sphere. Diamond Frost® can be used as a mass planting, alone in a container, or mixed with almost any other plant. Its fine sprays of foliage and flowers will weave through other plants making it a perfect complement for almost anything from poinsettias to petunias. It is an excellent background plant, filler, or specimen, proving to be an extremely beautiful and versatile new introduction.

  • Exposure: Full sun to part shade
  • Soil: Moist, well-drained
  • Hardiness: Use as an annual