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Selections for 2007

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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 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