(Eastern) White Oak
'Bud break'Quercus alba
Fagaceae · broadleaf deciduous tree · native
Last updated
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
Fall Color
Brown, purple, red
Origin
Maine to Florida, west to Minnesota and Texas
Watch for this season
Primary Spore Release
Cytospora CankerHigh
Spring Canker Activation
Leaf BlisterHigh
Spring Spore Germination and Infection
Nectria CankerHigh
Spore Release (Fall & Spring Rains)
+ 4 more — see full disease and pest lists below
Phenological Calendar
As of May 14, 2026, Puget Sound stations range from 1926.1 to 2121.1 GDD₃₂. (Eastern) White Oak has passed 'bud break' (725 GDD₃₂).
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of May 14, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 2,121 | 'Bud break' | — | — |
| Kent / Auburn | 2,113 | 'Bud break' | — | — |
| Seattle / UW | 2,085 | 'Bud break' | — | — |
| Olympia / Tumwater | 2,047 | 'Bud break' | — | — |
| Tacoma / Puyallup | 2,016 | 'Bud break' | — | — |
| Bellingham / Whatcom | 1,994 | 'Bud break' | — | — |
| Sequim / Rain Shadow | 1,926 | 'Bud break' | — | — |
| 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 May 14, 2026. Predicted dates use 16-day weather forecast through May 30, 2026, then climate normals.
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
Data Maturity Structured Multiple sources. Expert review underway.