Silver Maple
'Leaf emergence'Acer saccharinum
Sapindaceae, Aceraceae · broadleaf deciduous tree · native
Last updated
Plant Profile
Size & Form
Height
80–100 ft
Spread
49 ft
Growth Rate
Fast
Size at 20 yr
45 ft
Lifespan
Moderate
Site Requirements
Light
Sun to Part Shade
Soil Drainage
Wet Tolerant
Soil pH
4.0-7.3
Water
Moderate
Drought Tolerance
Low
Hardiness
Zones 3a–8b
Ornamental Interest
Bloom Time
March
Fall Color
Brown, yellow
Origin
from Quebec east to Minnesota, south to Oklahoma
Watch for this season
Powdery MildewHigh
Active Conidial Spread
Root Colonization Period
Wood DecayHigh
Wound Infection Window
AphidHigh
Peak Population & Dispersal
+ 9 more — see full disease and pest lists below
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
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Silver Maple has passed 'leaf emergence' (1496 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 | 'Leaf emergence' | — | — |
| Kent / Auburn | 2,665 | 'Leaf emergence' | — | — |
| Seattle / UW | 2,610 | 'Leaf emergence' | — | — |
| Olympia / Tumwater | 2,570 | 'Leaf emergence' | — | — |
| Tacoma / Puyallup | 2,535 | 'Leaf emergence' | — | — |
| Bellingham / Whatcom | 2,533 | 'Leaf emergence' | — | — |
| Sequim / Rain Shadow | 2,436 | 'Leaf emergence' | — | — |
View full calendar (2 stages)
| 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 Jun 3, 2026. Predicted dates use 16-day weather forecast through Jun 19, 2026, then climate normals.
Cultivars (1)
'Laciniatum'
Common name: Cutleaf Silver Maple
Hardy to USDA Zone 3
Data Maturity Structured Multiple sources. Expert review underway.