(Eastern) White Oak
Quercus alba
Fagaceae · broadleaf deciduous tree · native
Last updated
Data Maturity Structured
This profile synthesizes data from multiple published sources. Expert field review is in progress.
Quick Facts
Height
65 ft
Spread
32 ft
Growth Rate
Slow
Light
Full Sun
Soil
Moist
Water
Moderate
Hardiness
Zone Zones 3a–8b
Bloom Time
May
Origin
Maine to Florida, west to Minnesota and Texas
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. (Eastern) White Oak has passed 'bud break' (725 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 23, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,593 | 'Bud break' | — | — |
| Seattle / UW | 1,554 | 'Bud break' | — | — |
| Kent / Auburn | 1,537 | 'Bud break' | — | — |
| Olympia / Tumwater | 1,505 | 'Bud break' | — | — |
| Bellingham / Whatcom | 1,483 | 'Bud break' | — | — |
| Tacoma / Puyallup | 1,472 | 'Bud break' | — | — |
| Sequim / Rain Shadow | 1,434 | 'Bud break' | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'Bud break' BBCH '07' NOW | 725 | '' |
GDD = Growing Degree Days (base 32°F, Jan 1 start). Why base 32? GDD₃₂ thresholds from USA National Phenology Network citizen science observations (WA+OR). Season tracker for Kent / Auburn as of Apr 23, 2026. Predicted dates use 16-day weather forecast through May 10, 2026, then climate normals.
Diseases (14)
Ramorum Blight (Sudden Oak Death) Mistletoe abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Armillaria ostoyae Armillaria Root Rot Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Microstroma album Frosty Mildew Ganoderma applanatum Ganoderma Root and Butt Rot Pseudoinonotus dryadeus Inonotus Root and Butt Rot Taphrina spp. Leaf Blister Phoradendron villosum Mistletoe (a True Mistletoe) Neonectria ditissima Nectria Canker Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Inonotus dryophilus White Pocket Rot (Piped Rot)
Pests (14)
Looper Stem Gall Asterolecanium spp. Pit scale Platycotis vittata Oak Treehoppers Bucculatrix albertiella Oak Ribbed Casemaker Phylloxera spp. Oak leaf phylloxera Various (Cynipidae, Cecidomyiidae, Eriophyidae, Psyllidae) Leaf galls Neuroterus saltatorius Jumping Oak Gall Andricus quercuscalifornicus California Gallfly Prionoxystus robiniae Carpenterworm Oak gall wasp Bucculatrix ainsliella Oak skeletonizer Edwardsiana rosae Rose leafhopper Various (Cynipidae, Cecidomyiidae, Eriophyidae) Leaf and twig gall