Dwarf Japanese Pieris

Pieris japonica var. yakushimanum

Ericaceae · broadleaf evergreen shrub · introduced

Last updated March 15, 2026

Data Coverage 4 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

WSU HortSense lists 4 pest/disease fact sheets for Pieris (Andromeda) relevant to western Washington growing conditions.

— HortGuide editorial, from WSU HortSense

Quick Facts

Height

12 ft

Growth Rate

Slow

Light

Part Shade

Soil

Well Drained

Water

Moderate

Hardiness

Zone Zones 7b–9b

Bloom Time

April

Stage	Typical Window	What to Look For
Bloom start BBCH 61	Feb 15-Mar 15	First drooping panicles opening; white urn-shaped flowers visible
Bloom end / petal fall BBCH 69	Apr 1-Apr 30	Last petals falling; flower structures fading and browning
New growth flush BBCH 11	Apr 15-May 15	Lighter-colored new growth visible at branch tips, typically reddish
Fruit/seed development BBCH 71	May 1-Jun 30	Fruit or seed structures forming; fruit color: brown
Fruit/seed maturity BBCH 85	Jun 1-Aug 31	Fruit fully colored and ripened; seed dispersal may begin

'Prelude'

Common name: Prelude Pieris; Mature height: 2 ft