Pieris japonica 'Mountain Fire'

Tried and Trouble-free Recommended by 3 Professionals
Common Name: Japanese pieris
Type: Broadleaf evergreen
Family: Ericaceae
Zone: 5 to 8
Height: 4.00 to 8.00 feet
Spread: 3.00 to 6.00 feet
Bloom Time: April
Bloom Description: White
Sun: Full sun to part shade
Water: Medium
Maintenance: High
Flower: Showy
Leaf: Colorful, Evergreen
Other: Winter Interest
Tolerate: Deer, Heavy Shade


Best grown in humusy, organically rich, acidic, medium moisture, well-drained soils in full sun to part shade. In St. Louis, Japanese pieris doesn’t seem to perform well in most locations. Summer foliage decline and reduced vigor results in weakened plants that may succumb to harsh winters. It grows best in locations sheltered from wind with part afternoon shade. Remove spent flowers immediately after bloom.

Noteworthy Characteristics

Japanese pieris is a slow-growing broadleaf evergreen shrub with a dense, upright habit that matures over time to 9-12’ tall. ‘Mountain Fire’ is a popular cultivar that is particularly noted for the fiery red color of its newly emerging foliage and its heavy flower clusters. It typically matures in a spreading mound to 4’ tall and 3’ wide over the first 10 years. Over additional time, it may eventually reach 6-8’ tall. It features large pendulous clusters (racemes) of urn-shaped, lily-of-the-valley-like white flowers in early spring. If spent flowers are not trimmed off after bloom, they are followed by small 5-valved capsules. Serrulate, oblanceolate to obovate-oblong leaves (to 2” long) emerge bright red (hence the cultivar name), but mature to glossy dark green. Subsequent minor spurts of new growth in summer add interesting contrast to the foliage. Leaves are evergreen. Bead-like flower buds are set in late summer for the following year and provide winter interest and contrast to the evergreen foliage.


Dieback and leaf spot are occasional problems. Lace bug infestations can be a serious problem, particularly in the eastern U.S. Watch for mites, nematodes and scale.

Garden Uses

This cultivar is ideal for foundations and foreground placements in the shrub border. Also effective in open woodland areas. Effective when mixed with other broadleaf evergreens. May be massed, grouped or grown as small specimens.