A male clone of Arizona ash (Fraxinus velutina), cultivar 'Fan Tex' is also commonly sold as the Rio Grande ash. An excellent shade tree for hot summer regions, it matures 35 to 40 feet tall with a spreading, rounded canopy.
Fan Tex demonstrates increased tolerance to alkaline (high pH) soils, summer heat, drought and arid winds than other selections of Arizona ash. Faster growth rate and lusher canopy occurs with irrigation, keeping soil evenly moist, neither bone dry nor soggy.
Prune away dead branches any time of year. Use a hand pruners and make the cut 1/4 to 1/2 inch above a lower branch junction, leaf or dormant bud. Late winter pruning to retain wide-angled branch crotches and outward growing branches from the trunk when this ash is young develops a well-structured tree.
Fan Tex ash is susceptible to the fungal disease Texas root rot and borer insects. A healthy growing tree never stressed by drought is least susceptible to both problems. The root rot causes leaves to wilt suddenly in late spring -- there is no effective treatment. Preventative strategies against borers takes place in midsummer with spraying trunk and main branches with chlorpyrifos, according to Texas A&M University. This chemical pesticide brings health risks to humans.
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