Common Pawpaw Custard Apple
Asimina triloba
Annonaceae · broadleaf deciduous tree · native
Last updated
Data Coverage 4 of 6 dimensions
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 9, 2026, Puget Sound stations range from 1181.7 to 1312.1 GDD₃₂. Common Pawpaw Custard Apple typically reaches 'fall color / leaf senescence' at 1392 GDD₃₂, predicted around Apr 19.
Regional Season Tracker
GDD₃₂ accumulation across 7 Puget Sound stations · as of Apr 9, 2026| Station | GDD₃₂ | Current Stage | Next | To Go |
|---|---|---|---|---|
| Issaquah / East King | 1,312 | Pre-season | 'Fall color / leaf senescence' | 80 |
| Seattle / UW | 1,289 | Pre-season | 'Fall color / leaf senescence' | 103 |
| Kent / Auburn | 1,246 | Pre-season | 'Fall color / leaf senescence' | 146 |
| Olympia / Tumwater | 1,227 | Pre-season | 'Fall color / leaf senescence' | 165 |
| Bellingham / Whatcom | 1,213 | Pre-season | 'Fall color / leaf senescence' | 179 |
| Tacoma / Puyallup | 1,198 | Pre-season | 'Fall color / leaf senescence' | 194 |
| Sequim / Rain Shadow | 1,182 | Pre-season | 'Fall color / leaf senescence' | 210 |
| Stage | GDD32 | Typical Window |
|---|---|---|
| ○ 'Fall color / leaf senescence' BBCH '93' NEXT | 1392 | '' est. Apr 19 (forecast) |
| 'Flower buds visible' BBCH '51' | 1606 | '' est. May 1 (avg) |
| 'Bud break' BBCH '07' | 1614 | '' est. May 1 (avg) |
| 'First bloom' BBCH '61' | 1614 | '' est. May 1 (avg) |
| 'Leaf emergence' BBCH '11' | 1614 | '' est. May 1 (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 9, 2026. Predicted dates use 16-day weather forecast through Apr 25, 2026, then climate normals.
Diseases (15)
Blueberry mosaic virus and related viruses Virus Diseases Venturia inaequalis Scab Podosphaera aphanis var. aphanis Powdery Mildew Phytophthora spp Phytophthora fruit rot Cryptosporiopsis perennans Perennial Canker (Bull's-eye Rot) Nectria cinnabarina Nectria Twig Blight (Coral Spot) Neonectria ditissima Nectria Canker (European Canker) Fruit russet Fruit Russeting Erwinia amylovora Fire Blight Cytospora canker Cytospora Canker Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall Phytophthora cactorum (primary), P Crown and Collar Rot Non-pathogenic (genetic/physiological) Burrknot Non-pathogenic (calcium deficiency) Bitter Pit Neofabraea spp. (N Anthracnose and Bull's-eye rot
Pests (16)
Phyllonorycter blancardella Tentiform leafminer Malacosoma spp. Tent caterpillar Tetranychidae Spider mite Diaspidiotus perniciosus San Jose scale Parthenolecanium spp. Lecanium scale Tortricidae Leafroller Cicadellidae Leafhopper Archips argyrospila Fruittree leafroller Forficula auricularia Earwig Noctuidae Cutworms and Armyworms Cydia pomonella Codling moth Halyomorpha halys Brown marmorated stink bug Choreutis pariana Apple-and-thorn skeletonizer Rhagoletis pomonella Apple maggot Yponomeuta malinellus Apple ermine moth Aphidoidea Aphid