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Trees

  • 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
  • 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'
  • 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
  • Escarpment Oak - 2016 Quercus fusiformis
    Escarpment Oak
    2016 Quercus fusiformis
  • Escarpment Live Oak - 2016 Acorn
    Escarpment Live Oak
    2016 Acorn
  • Hedge Maple - 2015 Acer campestre
    Hedge Maple
    2015 Acer campestre
  • Desert-willow cultivars - 2014 Chilopsis liners
    Desert-willow cultivars
    2014 Chilopsis liners
  • Desert-willow cultivars - 2014 Chilopsis Flower
    Desert-willow cultivars
    2014 Chilopsis Flower
  • Winterberry Euonymus - 2013 Euonymus bungeanus
    Winterberry Euonymus
    2013 Euonymus bungeanus
  • Chinkapin Oak - 2012 Chinkapin Oak
    Chinkapin Oak
    2012 Chinkapin Oak
  • 'New Harmony' American Elm - 2011 Ulmus americana
    'New Harmony' American Elm
    2011 Ulmus americana
  • Indian Cherry - 2010 Rhamuns carolinians
    Indian Cherry
    2010 Rhamuns carolinians
  • Arizona Cypress - 2009 Cupressus arizonica
    Arizona Cypress
    2009 Cupressus arizonica
  • Bosnian Pine - 2008 Pinus heldreichii
    Bosnian Pine
    2008 Pinus heldreichii
  • Oklahoma Redbud - 2007 Cercis canadensis var. texensis
    Oklahoma Redbud
    2007 Cercis canadensis var. texensis
  • ‘Prairifire’ Crabapple - 2006 Malus ' Prairifire'
    ‘Prairifire’ Crabapple
    2006 Malus ' Prairifire'
  • Cedar Elm - 2005 Ulmus crassifolia
    Cedar Elm
    2005 Ulmus crassifolia
  • Cedar Elm - 2005 Ulmus crassifolia
    Cedar Elm
    2005 Ulmus crassifolia
  • Shantung Maple - 2004 Acer truncatum
    Shantung Maple
    2004 Acer truncatum
  • Kentucky Coffee Tree - 2003 Gymnocladus dioica
    Kentucky Coffee Tree
    2003 Gymnocladus dioica
  • Bur Oak - 2002 Quercus macrocarpa
    Bur Oak
    2002 Quercus macrocarpa
  • Shumard Oak - 2001 Quercus shumardii
    Shumard Oak
    2001 Quercus shumardii
  • Bald Cypress - 2000 Taxodium distichum
    Bald Cypress
    2000 Taxodium distichum
  • Chinese Pistache - 1999 Pistacia chinensis
    Chinese Pistache
    1999 Pistacia chinensis

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.

 

 

Tree for 2007

Oklahoma Redbud

Cercis canadensis var. texensis

A cultivar of Oklahoma’s state tree, ‘Oklahoma’ was discovered in the Arbuckle Mountains and was selected for the incredible magenta flowers that cover the tree in early spring. When the flowers fade, heart-shaped leaves emerge with a beautiful glossy sheen. ‘Oklahoma’ Redbud can withstand full sun and their small size (15' – 25' high) makes them perfect for use under utility lines. They tolerate a wide range of conditions but do best on well-drained soils. ‘Oklahoma’ is one of the most beautiful native trees and is perfect for small yards needing a splash of color or grouped together where space allows.

  • Exposure: Full sun to part shade
  • Soil: Well-drained
  • Hardiness: USDA Zone 6

 

 

 

Shrub for 2007

Southern Waxmyrtle

Myrica cerifera

Southern Waxmyrtle is a broad-leaved evergreen native to the southeast corner of Oklahoma and along much of the eastern coastal plain. It has been described as the southern cousin of Bayberry and has a similar scent when new leaves emerge in spring. Southern Waxmyrtle can be grown as a large shrub, making an excellent naturalistic screen, or can be pruned to tree form exposing its light-gray bark. It fixes atmospheric nitrogen making it suitable on poor soils and it withstands bog-like conditions. Narrow leaf, compact, and dwarf cultivars are available extending the possible uses for this native shrub.

  • Exposure: Full sun to part shade
  • Soil: Tolerates a wide range of soils
  • Hardiness: USDA Zone 7

 

 

 

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

 

 

 

Annual for 2007

Blanket Flower

Gaillardia

Gaillardia is a genus of native wildflowers that have captivated gardeners with bright red and yellow flowers and an ability to bloom in hot, dry conditions. The native species, Gaillardia pulchella, is Oklahoma’s state wildflower and makes an excellent garden plant. Hybrids (Gaillardia x grandiflora) and new cultivars have been introduced that expand the color range and form of Gaillardia including: ‘Goblin’ (dwarf form), ‘Fanfare’ (interesting trumpet-shaped flowers around the central disc), ‘Arizona Sun’ (compact plants with a long period of bloom), and ‘Summer’s Kiss’ (yellow-apricot flowers), among others. Gaillardia is often a perennial, but it also reseeds readily creating drifts of color in the garden or meadow. Allow the seed heads to dry on the plant for maximum reseeding and floral display the following summer.

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