(Eastern) White Oak
'Bud break'Quercus alba
Fagaceae · broadleaf deciduous tree · introduced
Last updated
Plant Profile
Size & Form
Height
65 ft
Spread
32 ft
Growth Rate
Slow
Site Requirements
Light
Full Sun
Soil Drainage
Moist
Soil pH
4.5-8.5
Water
Moderate
Drought Tolerance
Moderate to high
Hardiness
Zones 3a–8b
Ornamental Interest
Bloom Time
May
Fall Color
Brown, purple, red
Origin
Maine to Florida, west to Minnesota and Texas
Watch for this season
Cytospora CankerHigh
Peak Spore Production and Dispersal
Powdery MildewHigh
Active Conidial Spread
Anthracnose (Shade Trees)Moderate
Active Infection & Secondary Spread
Armillaria Root RotModerate
Active Below-ground Growth
+ 3 more — see full disease and pest lists below
Diseases: Regionally Documented (13)
Ramorum Blight (Sudden Oak Death) Mistletoe Armillaria spp. — primarily A 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: Regionally Documented (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
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. (Eastern) White Oak has passed 'bud break' (725 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Jun 3, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,673 | 'Bud break' | — | — |
| Kent / Auburn | 2,665 | 'Bud break' | — | — |
| Seattle / UW | 2,610 | 'Bud break' | — | — |
| Olympia / Tumwater | 2,570 | 'Bud break' | — | — |
| Tacoma / Puyallup | 2,535 | 'Bud break' | — | — |
| Bellingham / Whatcom | 2,533 | 'Bud break' | — | — |
| Sequim / Rain Shadow | 2,436 | 'Bud break' | — | — |
View full calendar (1 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| ● 'Bud break' BBCH '07' NOW | 725 | '' |
Source: 'NPN citizen science observations (WA+OR), n=5, median. services.usanpn.org' About GDD₃₂ →
Season tracker for Kent / Auburn as of Jun 3, 2026. Predicted dates use 16-day weather forecast through Jun 19, 2026, then climate normals.
Data Maturity Structured Multiple sources. Expert review underway.