Common Sassafras
Sassafras albidum
Lauraceae · broadleaf deciduous tree · native
Last updated
Data Coverage 3 of 6 dimensions
Quick Facts
Height
30–60 ft
Spread
49 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Well Drained
Water
Low
Hardiness
Zone Zones 4a–8b
Bloom Time
April to May
Fall Color
Scarlet
Origin
from Maine to Ontario and Michigan, south to Florida and
Phenological Calendar
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Mar 30, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,116 | Full bloom | — | — |
| Seattle / UW | 1,112 | Full bloom | — | — |
| Olympia / Tumwater | 1,049 | Full bloom | — | — |
| Kent / Auburn | 1,048 | Full bloom | — | — |
| Bellingham / Whatcom | 1,041 | Full bloom | — | — |
| Tacoma / Puyallup | 1,017 | Full bloom | — | — |
| Sequim / Rain Shadow | 1,012 | Full bloom | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| Bud break BBCH 07 | — | Feb 15-Mar 15 |
| Leaf emergence BBCH 11 | — | Mar 1-Apr 1 |
| Bloom start BBCH 61 | 708 | May 1-May 31 |
| ● Full bloom BBCH 65 NOW | 800 | — |
| Bloom end / petal fall BBCH 69 | — | May 15-Jun 15 |
| Fruit/seed development BBCH 71 | — | Jun 1-Aug 31 |
| Fall color / leaf senescence BBCH 93 | — | Oct 1-Nov 15 |
| Dormancy BBCH 97 | — | Nov 15-Feb 28 |
Range: 526–683 GDD₃₂
(6yr)
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? Source GDD₅₀ thresholds from Herms 2004 (OSU, Secrest Arboretum, Ohio) and UMD IPMnet (Gill & Klick, mid-Atlantic), converted to GDD₃₂ via Kent bloom-date mapping. Season tracker for Kent / Auburn as of Mar 30, 2026. Predicted dates use 16-day weather forecast through Apr 15, 2026, then climate normals.