Compact Garland Spirea
Beginning of floweringSpiraea x arguta
Rosaceae · [VERIFY] · introduced
Last updated
Compact garland spirea is a hybrid deciduous shrub reaching 2-3 feet tall and wide, producing small, narrow leaves and abundant clusters of white flowers arranged along arching branches in spring. The plant has a fine-textured, spreading habit.
This hybrid is hardy to zones 4-9 and thrives in full sun to light shade with well-drained soil. It is fast-growing and responds well to pruning. The plant is valued for its early spring bloom and fine texture in borders and naturalized gardens.
Plant Profile
Site Requirements
Ornamental Interest
Phenological Calendar
As of June 4, 2026, Puget Sound stations range from 2458.5 to 2700.8 GDD₃₂. Compact Garland Spirea has passed beginning of flowering (1391 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Jun 4, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,701 | Beginning of flowering | — | — |
| Kent / Auburn | 2,695 | Beginning of flowering | — | — |
| Seattle / UW | 2,637 | Beginning of flowering | — | — |
| Olympia / Tumwater | 2,598 | Beginning of flowering | — | — |
| Tacoma / Puyallup | 2,564 | Beginning of flowering | — | — |
| Bellingham / Whatcom | 2,560 | Beginning of flowering | — | — |
| Sequim / Rain Shadow | 2,459 | Beginning of flowering | — | — |
View full calendar (2 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| Full bloom BBCH 65 | 1377 | — |
| ● Beginning of flowering BBCH 61 NOW | 1391 | — |
Source: UMD: extension.umd.edu) About GDD₃₂ →
Season tracker for Kent / Auburn as of Jun 4, 2026. Predicted dates use 16-day weather forecast through Jun 20, 2026, then climate normals.