Persian speedwell
Veronica persica
Plantaginaceae · [VERIFY] · naturalized
Last updated
Persian speedwell is a winter-annual weedy species native to Eurasia. It prefers partial to full sun, moist rich loamy soil, but adapts to poor soil. Most growth occurs during cool late-winter and early spring, blooming through early summer.
Persian speedwell is found in lawns, fields, gardens, and disturbed areas across much of North America. It reproduces entirely by seed and is notable for its ability to colonize poor and disturbed soils. It blooms early in the season before many perennials emerge.
Quick Facts
Phenological Calendar
As of May 24, 2026, Puget Sound stations range from 2172.5 to 2394 GDD₃₂. Persian speedwell has passed beginning of flowering (120 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 | Beginning of flowering | — | — |
| Kent / Auburn | 2,373 | Beginning of flowering | — | — |
| Seattle / UW | 2,332 | Beginning of flowering | — | — |
| Olympia / Tumwater | 2,295 | Beginning of flowering | — | — |
| Tacoma / Puyallup | 2,259 | Beginning of flowering | — | — |
| Bellingham / Whatcom | 2,256 | Beginning of flowering | — | — |
| Sequim / Rain Shadow | 2,173 | Beginning of flowering | — | — |
View full calendar (1 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● Beginning of flowering BBCH 61 NOW | 120 | — |
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.