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garden:monkey_puzzle_strip:pieris

Pieris japonica

Pieris japonica — Lily-of-the-Valley Shrub / Japanese Andromeda

Pieris japonica in full flower, March 2026

Photo: March 20, 2026 at 14:16 — cascading clusters of pink urn-shaped flowers in full display, with dark glossy evergreen foliage. Large conifers visible behind.

About

*Pieris japonica* is one of the finest spring-flowering shrubs for a Pacific Northwest garden. The long, drooping panicles of small bell-shaped flowers (resembling lily-of-the-valley) appear in late winter to early spring, often before most other things are blooming. The foliage is an added attraction: new growth emerges in brilliant shades of red, bronze, or copper before maturing to glossy dark green.

Key Characteristics

  • Type: Evergreen shrub, family Ericaceae
  • Flowers: Small urn-shaped flowers in drooping panicles; white to deep pink depending on cultivar; February–April
  • Foliage: Glossy dark green; new growth colourful (red/bronze/cream depending on variety)
  • Size: Typically 2–4 m tall and wide; slow-growing
  • Form: Rounded, layered habit
  • Toxic: All parts are toxic if ingested — keep away from livestock and pets

Care Notes

Aspect Details
Hardiness Hardy to −15°C (Zone 6); performs beautifully in the Pacific Northwest
Soil Acidic (pH 4.5–6.0), humus-rich, moisture-retentive but well-drained — ideal under conifers
Sun Dappled shade to part shade; protect from harsh afternoon sun and drying winds
Watering Keep consistently moist, especially in summer; mulch well to retain soil moisture
Pruning Minimal — deadhead spent flower clusters after blooming; light shaping if needed
Fertilising Feed with an ericaceous (acid) fertiliser in spring
Pests Lace bugs can cause bronzing of foliage in stressed plants; vine weevil occasionally

Notes

  • Flower buds set in autumn and are visible through winter — avoid late frosts which can damage buds
  • Excellent companion for Rhododendrons, Azaleas, and other acid-loving plants
  • The cultivar in this garden appears to have mid-pink flowers
  • Mulching with bark or pine needles maintains soil acidity and moisture

See Also

garden/monkey_puzzle_strip/pieris.txt · Last modified: by duff