Silver Maple
Acer saccharinum
Sapindaceae, Aceraceae · 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
80–100 ft
Spread
49 ft
Growth Rate
Fast
Light
Sun to Part Shade
Soil
Wet Tolerant
Water
Moderate
Hardiness
Zone Zones 3a–8b
Bloom Time
March
Origin
from Quebec east to Minnesota, south to Oklahoma
Phenological Calendar
As of April 23, 2026, Puget Sound stations range from 1434.4 to 1592.7 GDD₃₂. Silver Maple has passed 'leaf emergence' (1496 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 | 'Leaf emergence' | — | — |
| Seattle / UW | 1,554 | 'Leaf emergence' | — | — |
| Kent / Auburn | 1,537 | 'Leaf emergence' | — | — |
| Olympia / Tumwater | 1,505 | 'Leaf emergence' | — | — |
| Bellingham / Whatcom | 1,483 | 'Bud break' | 'Leaf emergence' | 13 |
| Tacoma / Puyallup | 1,472 | Pre-season | 'Bud break' | 4 |
| Sequim / Rain Shadow | 1,434 | Pre-season | 'Bud break' | 42 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Bud break' BBCH '07' | 1476 | '' |
| ● 'Leaf emergence' BBCH '11' NOW | 1496 | '' |
Range: 189–402 GDD₃₂
(6yr)
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 (19)
Verticillium dahliae Verticillium Wilt Rhytisma punctatum Tar Spots Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Phyllosticta spp. Phyllosticta Leaf Spot Neonectria ditissima Nectria Canker abiotic (drought, heat stress) or bacterial (Xylella fast... Leaf Scorch Multiple possible causes (see Disease Cycle section) Fasciation Bacterial Leaf Spot and Dieback Discula destructiva (dogwood), Kabatiella and Discula spp... Anthracnose Kretzschmaria deusta Brittle Decay Limb and Wood Decay Armillaria ostoyae Armillaria Root Rot Bigleaf Maple Decline (Bigleaf Maple Dieback) Phytophthora spp. (P Bleeding Canker Various fungi (Phoma spp., Phomopsis spp., Cytospora spp.... Branch Canker Taphrina spp. Leaf Blister Symptom category — not a single disease Leaf Spot Phytophthora spp. (P Phytophthora Root Rot Cryptostroma corticale Sooty Bark Disease
Pests (13)
Vasates quadripedes Maple Bladdergall Mite Pulvinaria innumerabilis Cottony maple scale Aphidoidea Aphid Boisea rubrolineata Western boxelder bug Prionoxystus robiniae Carpenterworm Megachile spp. Leafcutting bee Proteoteras aesculana Maple tip moth (Maple twig borer) Lepidosaphes ulmi Oystershell scale Otiorhynchus spp. Root weevil Edwardsiana rosae Rose leafhopper Leucoma salicis Satin moth Frankliniella occidentalis Western flower thrips Proteoteras moffatiana Maple shoot moth
Cultivars (1)
'Laciniatum'
Common name: Cutleaf Silver Maple
Hardy to USDA Zone 3