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Japanese andromeda
Habit (mature) · Stan Shebs / Wikimedia Commons · CC BY-SA 3.0
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Japanese andromeda

Pieris japonica
A dense, upright-to-rounded broadleaf evergreen shrub, 8-10 feet tall and 6-8 feet wide, grown for year-round structure and its long late-winter-to-spring show of drooping panicles of fragrant, urn-shaped white (sometimes pink) flowers. Glossy dark green leaves are joined each spring by a striking flush of bronze-red to coppery new growth, and the chains of greenish-red flower buds form in fall and hold all winter for a second season of interest. Native to southeastern China, central to southern Japan, and Taiwan, it wants acidic, evenly moist but well-drained soil, shelter from harsh winter wind, and protection from hot afternoon sun in warmer zones. All parts are toxic if eaten.
Review: Source-backed
Climate fit: moderate (41/100)
Structure
Focal point
Border
Light
Full sun / Part shade
Water
Consistent moisture
Mature size
96-120" tall · 54" apart
Hardy in zones
4b-8b
very cold to frosty winters
Native in Illinois
No

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All parts of the plant are toxic to people and livestock — they contain grayanotoxins, the same class of toxin as in rhododendrons and azaleas.

Cold hardiness

Future
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
USDA
Published baseline for this location from 1991-2020.
Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer
Well-suited
2050
Zone 7a
Plotwright
Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).
Well-suited
In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Future
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
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Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Japanese andromeda (Pieris japonica). Retrieved 2026, June 13, from https://plotwright.garden/plants/pieris-japonica
Sources for every fact
Every fact on this page traces to a source. 18 fields cited18 source-backed.
NC State Extension Gardener Plant Toolbox
University extension service
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Wikimedia Commons
Photo · CC BY-SA 3.0
Backs 1 field
Image

Community photos

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