Nantucket serviceberry
Amelanchier nantucketensis
Rosaceae · [VERIFY] · introduced
Last updated
Compact, rhizomatous shrub growing 4 to 5 feet tall with narrow, fine-textured leaves and clusters of white flowers in spring. Produces blue-black berries; naturally forms dense mounding to spreading form.
Extremely drought tolerant once established, thriving in sandy, well-drained soils and full sun. Suited to tough sites, native plant gardens, and bird borders. Spreading growth habit makes it useful for erosion control.
Quick Facts
Phenological Calendar
As of May 24, 2026, Puget Sound stations range from 2172.5 to 2394 GDD₃₂. Nantucket serviceberry has passed full bloom (992 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of May 24, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,394 | Full bloom | — | — |
| Kent / Auburn | 2,373 | Full bloom | — | — |
| Seattle / UW | 2,332 | Full bloom | — | — |
| Olympia / Tumwater | 2,295 | Full bloom | — | — |
| Tacoma / Puyallup | 2,259 | Full bloom | — | — |
| Bellingham / Whatcom | 2,256 | Full bloom | — | — |
| Sequim / Rain Shadow | 2,173 | Full bloom | — | — |
View full calendar (1 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● Full bloom BBCH 65 NOW | 992 | — |
Source: UMD phenology catalog (UMD: extension.umd.edu) About GDD₃₂ →
Season tracker for Kent / Auburn as of May 24, 2026. Predicted dates use 16-day weather forecast through Jun 9, 2026, then climate normals.