Silver Maple
Acer saccharinum
Sapindaceae, Aceraceae · broadleaf deciduous tree · native
Last updated
Data Coverage 5 of 6 dimensions
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 3, 2026, Puget Sound stations range from 1070 to 1180.6 GDD₃₂. Silver Maple typically reaches 'bud break' at 1476 GDD₃₂, predicted around Apr 21.
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 3, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,181 | Pre-season | 'Bud break' | 295 |
| Seattle / UW | 1,171 | Pre-season | 'Bud break' | 305 |
| Kent / Auburn | 1,111 | Pre-season | 'Bud break' | 365 |
| Olympia / Tumwater | 1,106 | Pre-season | 'Bud break' | 370 |
| Bellingham / Whatcom | 1,101 | Pre-season | 'Bud break' | 375 |
| Tacoma / Puyallup | 1,075 | Pre-season | 'Bud break' | 401 |
| Sequim / Rain Shadow | 1,070 | Pre-season | 'Bud break' | 406 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ○ 'Bud break' BBCH '07' NEXT | 1476 | '' est. Apr 21 (avg) |
| 'Leaf emergence' BBCH '11' | 1496 | '' est. Apr 22 (avg) |
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 3, 2026. Predicted dates use 16-day weather forecast through Apr 19, 2026, then climate normals.
Diseases (19)
Verticillium dahliae Verticillium Wilt Rhytisma punctatum Tar Spots Podosphaera aphanis var. aphanis 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 Pseudomonas syringae Bacterial Leaf Spot and Dieback Colletotrichum acutatum complex (C 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