North Central Regional Plant Introduction Station
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Landscape Plant News
Flowering ash (Fraxinus omus L.) is native to southern Europe and western Asia. At maturity, this ash is an oval-headed tree with glossy, dark green leaves, which grows to about 50 feet (15 meters) tall. Its most notable feature appears in May: showy panicles of fragrant, cream-colored flowers, which help make this species a popular street and park tree in those regions where it is winter hardy. Dirr (1983) notes that it is hardy to -10°F (- 230C) and, similarly, it is listed for USDA Hardiness Zone 6 in Hortus Third (1976). A seedling population of flowering ash, PI 385252, from Bosnia & Herzegovina was evaluated at eleven sites in USDA Hardiness Zones 3b to 6a across the northcentral United States from 1976 to 1986 (Widrlechner et al., 1992), but only one of 32 trees survived the trial and the above ground portions of the single survivor were repeatedly killed to the base.
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Pair, John C. and Widrlechner, Mark P., "Evaluation of Flowering Ash in Wichita, Kansas" (1994). NCRPIS Publications and Papers. 63.