Japanese Flowering Crabapple

Full bloom

Malus floribunda

Rosaceae · broadleaf deciduous tree · introduced

Last updated

Data Maturity
Structured Multiple sources. Expert review underway.
Watch for this season
Cytospora CankerHigh

Spring Canker Activation

Diplodia CankerHigh

Infection Through Stressed or Wounded Tissue

Fire BlightHigh

Bloom Infection Window

RustHigh

Aecial Stage (Alternate Host)

+ 9 more — see full disease and pest lists below

Quick Facts

Height
20–25 ft
Spread
32 ft
Growth Rate
Moderate
Light
Full Sun
Soil
Moist
Water
Moderate
Hardiness
Zone Zones 3a–9b
Bloom Time
April
Origin
Japan and East Asia; a hybrid possibly composed of M.

Phenological Calendar

As of May 10, 2026, Puget Sound stations range from 1825.8 to 2009.6 GDD₃₂. Japanese Flowering Crabapple has passed full bloom (1143 GDD₃₂).

Regional Season Tracker

GDD₃₂ accumulation across 7 Puget Sound stations · as of May 10, 2026
Station GDD₃₂ Current Stage Next To Go
Issaquah / East King 2,010 Full bloom — —
Kent / Auburn 1,999 Full bloom — —
Seattle / UW 1,978 Full bloom — —
Olympia / Tumwater 1,939 Full bloom — —
Tacoma / Puyallup 1,907 Full bloom — —
Bellingham / Whatcom 1,889 Full bloom — —
Sequim / Rain Shadow 1,826 Full bloom — —
Stage GDD32 Typical Window
Bloom start BBCH 61 1096 Mar 15-May 15
● Full bloom BBCH 65 NOW 1143 —
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 31
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
Regional estimate
Range: 611–758 GDD₃₂ (6yr)

Sources: USDA Plants Database (seasonal estimate) ; OSU phenology catalog (OSU: weather.cfaes.osu.edu) About GDD₃₂ →

Season tracker for Kent / Auburn as of May 10, 2026. Predicted dates use 16-day weather forecast through May 26, 2026, then climate normals.

Diseases — Regionally Documented (34)

Blueberry mosaic virus and related viruses Virus Diseases Venturia spp. — multiple host-specific species: V Scab Multiple obligate biotrophic fungi (Erysiphales: Erysipha... Powdery Mildew Phytophthora spp Phytophthora fruit rot Perennial Canker (Bull's-eye Rot) Nectria cinnabarina Nectria Twig Blight (Coral Spot) Nectria Canker (European Canker) Fruit russet Fruit Russeting Erwinia amylovora Fire Blight Cytospora spp. (Valsa spp., Leucostoma spp.) Cytospora Canker Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall Phytophthora cactorum (primary), P Crown and Collar Rot Burrknot Bitter Pit Apple mosaic Apple Mosaic Apple proliferation Apple Proliferation Apple dead Dead Spur Diplodia seriata and D Diplodia Canker Apple flat Flat Apple Disease Green Crinkle Disease Three viruses Latent Virus Diseases Several different Moldy Core and Core Rots Necrotic Leaf Blotch (Golden Leaf Drop) Isolation attempts Necrotic Leaf Spot Pythium spp., Phytophthora spp., Rhizoctonia spp., Fusari... Replant Disease Apple rubbery wood virus 1 and 2 Rubbery Wood and Flat Limb Multiple genera (Melampsoridium, Thekopsora, Naohidemyces... Rust Apple scar skin viroid Scar Skin and Dapple Apple Botrytis cinerea, Penicillium spp., and others; abiotic d... Storage Problems Tomato ringspot Union Necrosis and Decline Twig Dieback and Canker Phytophthora syringae (primary), P Stem Rot Xiphinema americanum and related species Nematode, Dagger Pratylenchus penetrans (primary) and P Nematode, Root-lesion

Pests — Regionally Documented (20)