Hardy Rubber Tree

Hardy Rubber Tree (Eucommia ulmoides)

Full to part sun, medium moisture, adaptable to clay, loam, and sandy soils, pH 5.5–7.5; tolerates urban pollution and compaction.

40–60 feet tall by 40–60 feet wide; dioecious; flowers are small, petal-less, appearing in early spring before leaf emergence; fruit on female trees is a winged samara 25-38 mm long, ripening in fall. Growth rate medium.

Native region: Not native to Tennessee; ornamental introduction from central China.

The only hardy temperate tree known to produce rubber-bearing latex — tearing a leaf slowly reveals fine white latex threads bridging the tear, a reliable field identification character. Eucommia ulmoides is unusually pest- and disease-resistant, with no serious insect or fungal problems documented in UT Extension shade tree surveys for Tennessee landscapes, making it a low-maintenance canopy option for the I-65 corridor. It handles Middle Tennessee's heavy clay soils, periodic drought, and summer humidity without the typical establishment failures seen in more finicky ornamentals. Site it in full sun for the densest crown; part-shade planting produces acceptable results but with a more open habit. Fruit production on female trees is heavy and the samaras can be messy on paved surfaces — select male cultivars for street-side or patio planting.