Wafer-ash is a small native tree or large shrub. It produces small fragrant flowers and wafer-like winged seeds, similar to elms. It is a good plant for naturalizing or woodland landscapes. Despite the name, this tree is not a true ash tree and is unaffected by the emerald ash borer.
This species is native to the Chicago region according to Swink and Wilhelm’s Plants of the Chicago Region, with updates made according to current research.
- Family (English) Citrus, Rue
- Family (botanic) Rutaceae
- Tree or plant type Tree, Shrub
- Foliage Deciduous (seasonally loses leaves)
- Native locale Chicago area, Illinois, North America
- Size range Large shrub (more than 8 feet), Compact tree (10-15 feet), Small tree (15-25 feet)
- Light exposure Full sun (6 hrs direct light daily), Partial sun / shade (4-6 hrs light daily), Full shade (4 hrs or less of light daily)
- Hardiness zones Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8, Zone 9
- Soil preference Moist, well-drained soil
- Tolerances Alkaline soil, Clay soil, Occasional drought, Road salt
- Season of interest mid spring, late spring, early summer, midsummer
- Flower color and fragrance White
- Shape or form Irregular, Multi-stemmed, Round
- Growth rate Moderate