Sargent Crabapple
Full bloomMalus sargentii
Rosaceae · broadleaf deciduous tree · introduced
Last updated
Sargent crabapple is the compact ornamental crabapple most suited to small Puget Sound gardens, reaching only 8 feet tall with a 16-foot spread. The compact size makes disease management easier than on full-sized crabapples. That said, 42 diseases and 26 pests are documented, and the diseases that matter here are the same as for all Malus in our region: fire blight in wet springs, scab during extended wet periods, and powdery mildew. The tree tolerates our lowland soils better than many crabapples. Bloom starts around 230 GDD base 50, typically April. The small red fruit persists into winter and provides bird food. For a flowering ornamental tree on a small lot with typical lowland soil, Sargent crabapple is a reasonable choice if you accept the disease monitoring that comes with any Malus in our climate.
— Chris Welch, ISA Certified Arborist
Plant Profile
Size & Form
Site Requirements
Ornamental Interest
Peak Spore Production and Dispersal
Bloom Infection Window
Active Conidial Spread
Uredinial Stage (Summer)
+ 9 more — see full disease and pest lists below
Diseases: Regionally Documented (32)
Pests: Regionally Documented (20)
Phenological Calendar
As of June 3, 2026, Puget Sound stations range from 2435.5 to 2672.8 GDD₃₂. Sargent Crabapple has passed full bloom (1341 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 | Full bloom | — | — |
| Kent / Auburn | 2,665 | Full bloom | — | — |
| Seattle / UW | 2,610 | Full bloom | — | — |
| Olympia / Tumwater | 2,570 | Full bloom | — | — |
| Tacoma / Puyallup | 2,535 | Full bloom | — | — |
| Bellingham / Whatcom | 2,533 | Full bloom | — | — |
| Sequim / Rain Shadow | 2,436 | Full bloom | — | — |
View full calendar (9 stages)
| Stage | GDD32 | Typical Window |
|---|---|---|
| Bloom start BBCH 61 | 1035 | Apr 1-Apr 30 |
| ● Full bloom BBCH 65 NOW | 1341 | — |
| Bud break BBCH 07 | — | Feb 15-Mar 15 |
| Leaf emergence BBCH 11 | — | Mar 1-Apr 1 |
| Bloom end / petal fall BBCH 69 | — | Apr 15-May 15 |
| Fruit/seed development BBCH 71 | — | Jun 1-Aug 31 |
| Fruit/seed maturity BBCH 85 | — | Sep 1-Nov 30 |
| Fall color / leaf senescence BBCH 93 | — | Oct 1-Nov 15 |
| Dormancy BBCH 97 | — | Nov 15-Feb 28 |
Sources: USDA Plants Database (seasonal estimate) ; OSU phenology catalog (OSU: weather.cfaes.osu.edu) 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.