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Selections for 2001

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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 2001

Shumard Oak

Quercus shumardii

Shumard Oak is an Oklahoma native plant that can grow to be over 100’ tall in the wild, but reaches 40 – 60’ in the landscape. Shumard Oak produces healthy green foliage even on alkaline soils, tolerates summer heat and drought, and transplants easily.

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




Shrub for 2001

Deciduous Holly

Ilex decidua

Deciduous Holly is a native plant typically grown as a multi-stemmed shrub. It tolerates heat, drought, and poorly drained soils and reaches a height of 8 to 12 feet. Female cultivars of Deciduous Holly have beautiful red to yellow berries that remain on the plant through the winter. Male and female cultivars should be planted for fruit production.

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




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




Annual for 2001

Mexican Zinnia

Zinnia angustifolia

Several cultivars of Mexican Zinnia are available with white, yellow, or orange flowers that bloom all summer. All thrive in the heat, are mildew resistant, and make excellent 1-foot-tall compact plants for containers, bedding, or edging.

  • Sun Exposure: Full
  • Soil: Well-drained
  • Hardiness: Use as an annual