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Common Pawpaw Custard Apple

Asimina triloba

Annonaceae · broadleaf deciduous tree · native

Last updated

Data Coverage 4 of 6 dimensions
Site Data
Threats
Cultivars
Phenology
GDD Thresholds
Puget Sound

Quick Facts

Height
15–20 ft
Spread
13 ft
Growth Rate
Slow
Light
Part Shade
Soil
Wet Tolerant
Water
Moderate
Hardiness
Zone Zones 5a–8b
Bloom Time
April to May
Fall Color
Yellow
Origin
extends from Ontario, north of Lake Erie

Phenological Calendar

As of April 3, 2026, Puget Sound stations range from 1070 to 1180.6 GDD₃₂. Common Pawpaw Custard Apple typically reaches 'fall color / leaf senescence' at 1392 GDD₃₂, predicted around Apr 17.

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 'Fall color / leaf senescence' 211
Seattle / UW 1,171 Pre-season 'Fall color / leaf senescence' 221
Kent / Auburn 1,111 Pre-season 'Fall color / leaf senescence' 281
Olympia / Tumwater 1,106 Pre-season 'Fall color / leaf senescence' 286
Bellingham / Whatcom 1,101 Pre-season 'Fall color / leaf senescence' 291
Tacoma / Puyallup 1,075 Pre-season 'Fall color / leaf senescence' 317
Sequim / Rain Shadow 1,070 Pre-season 'Fall color / leaf senescence' 322
Stage GDD32 Typical Window
○ 'Fall color / leaf senescence' BBCH '93' NEXT 1392 '' est. Apr 17 (forecast)
'Flower buds visible' BBCH '51' 1606 '' est. Apr 28 (avg)
'Bud break' BBCH '07' 1614 '' est. Apr 29 (avg)
'First bloom' BBCH '61' 1614 '' est. Apr 29 (avg)
'Leaf emergence' BBCH '11' 1614 '' est. Apr 29 (avg)

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 (15)

Pests (16)