Silver Maple
'Leaf emergence'Acer saccharinum
Sapindaceae, Aceraceae · broadleaf deciduous tree · native
Last updated
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
Fall Color
Brown, yellow
Origin
from Quebec east to Minnesota, south to Oklahoma
Watch for this season
Primary Spore Release
Leaf BlisterHigh
Spring Spore Germination and Infection
Nectria CankerHigh
Spore Release (Fall & Spring Rains)
Phyllosticta Leaf SpotHigh
Primary Spore Release
+ 10 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. Silver Maple has passed 'leaf emergence' (1496 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 | 'Leaf emergence' | — | — |
| Kent / Auburn | 2,113 | 'Leaf emergence' | — | — |
| Seattle / UW | 2,085 | 'Leaf emergence' | — | — |
| Olympia / Tumwater | 2,047 | 'Leaf emergence' | — | — |
| Tacoma / Puyallup | 2,016 | 'Leaf emergence' | — | — |
| Bellingham / Whatcom | 1,994 | 'Leaf emergence' | — | — |
| Sequim / Rain Shadow | 1,926 | 'Leaf emergence' | — | — |
| Stage | GDD32 | Typical Window |
|---|---|---|
| 'Bud break' BBCH '07' | 1476 | '' |
| ● 'Leaf emergence' BBCH '11' NOW | 1496 | '' |
Range: 189–402 GDD₃₂
(6yr)
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 (17)
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 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 Multiple Basidiomycete fungi cause wood decay in trees Wood Decay Armillaria spp. — primarily A Armillaria Root Rot Bigleaf Maple Decline (Bigleaf Maple Dieback) Phytophthora spp. (P Bleeding 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: Regionally Documented (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
Data Maturity Structured Multiple sources. Expert review underway.