Texas ash – a better choice

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Texas ash (Fraxinus texensis or F. americana var. texensis) is a handsome shade tree getting up to 30-45 feet high.

Texas ash grows into small shade tree with lush green foliage. (photo by Bill Ward)
Texas ash grows into small shade tree with lush green foliage. (photo by Bill Ward)

Once established, Texas ash is drought-tolerant. The dark-green leaves are opposite and compound with five to seven leaflets. During fall the foliage has nice color. “With redder shades on the outside and yellows on the inside, the whole tree looks like a candle flame” (Sally Wasowski, “Native Texas Plants, Landscaping Region by Region“).

Many botanists believe Texas ash is a variety of white ash (Fraxinus americana), from which it is hard to distinguish. Texas ash has five to seven leaflets, typically 5, while white ash has five to nine elongate leaflets, typically 7. White ash, native to the eastern part of the state, can grow to be a larger tree than Texas ash.

Texas ash is endemic to limestone areas of southern Oklahoma down through North Central Texas and across the Edwards Plateau, including Kendall County. Some Texas ash trees also grow in the Ft. Davis area. Texas ash should do very well in Hill Country-area yards.

Compound leaves of Texas ash. (photo John Siemssen)
Compound leaves of Texas ash. (photo John Siemssen)

This tree is adapted to well-drained calcareous soils. It is hardy, fairly fast growing, long-lived and fairly resistant to pests and disease, and it is the most drought-tolerant of the ashes usually available at nurseries.

The most commonly planted (some say overplanted) ash in local landscapes is the non-indigenous Mexican or “Arizona ash” (F. berlandandieriana), which requires a lot of irrigation, is susceptible to pests and disease, does not have fall color, and is short-lived. Texas ash is a better choice for home gardeners as well as for landscapers and developers in this area.

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About the Region

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Salado, the location of our Fall 2025 Symposium, lies at the intersection of two ecoregions: the Edwards Plateau (Limestone Cut Plain) and Blackland Prairie (Northern Blackland Prairie).

The Edwards Plateau area is also called the Hill Country; however, this general term covers a much larger area extending farther north. Spring-fed creeks are found throughout the region; deep limestone canyons, rivers, and lakes (reservoirs) are common. Ashe juniper is perhaps the most common woody species found throughout the region. Additional woody species include various species of oak, with live oak (Quercus fusiformis) being the most common. Sycamores (Platanus occidentalis) and bald cypress (Taxodium distichum) border waterways. This area is well known for its spring wildflower displays, though they may be viewed in spring, late summer, and fall, as well. According to Texas Parks and Wildlife, average annual rainfall in the Edwards Plateau ranges from 15 to 34 inches.

The Blackland Prairie extends from the Red River south to San Antonio, bordered on the west by the Edwards Plateau and the Cross Timbers, and on the east by the Post Oak Savannah. Annual rainfall averages 30 to 40 inches, with higher averages to the east. This region is dominated by prairie species. The most common grass species include little bluestem (Schizachyrium scoparium) and Indian grass (Sorghastrum nutans) in the uplands and switchgrass (Panicum virgatum) in the riparian areas and drainages. Common herbaceous flowering plants include salvias, penstemons, and silphiums. This area has suffered greatly from overgrazing and agricultural use. Few intact areas remain, though many of the plants can be found along county roadsides throughout the region.

Our fall Symposium host chapter, the Tonkawa Chapter, includes both of these ecoregions.

Source: Wildflowers of Texas by Michael Eason