American Euonymus

Euonymus americanus

Celastraceae · broadleaf deciduous shrub · native

Last updated March 8, 2026

Data Coverage 3 of 6 dimensions

Site Data

Threats

Cultivars

Phenology

GDD Thresholds

Puget Sound

Quick Facts

Height

4–6 ft

Growth Rate

Moderate

Light

Sun to Part Shade

Soil

Wet Tolerant

Water

High

Hardiness

Zone Zones 5a–8b

Bloom Time

May to June

Fall Color

Red, yellow

Origin

New York to Florida, west to Texas

Phenological Calendar

Stage	Typical Window	What to Look For
Bud break BBCH 07	Feb 15-Mar 15	Buds swelling and beginning to open; first green tissue visible
Leaf emergence BBCH 11	Mar 1-Apr 1	First leaves fully unfurled on new growth
Bloom start BBCH 61	May 1-May 31	First open flowers visible; flowers green
Bloom end / petal fall BBCH 69	May 15-Jun 15	Last petals falling; flower structures fading
Fruit/seed development BBCH 71	Jun 1-Aug 31	Fruit or seed structures forming; fruit color: yellow
Fruit/seed maturity BBCH 85	Sep 1-Nov 30	Fruit fully colored and ripened; seed dispersal may begin
Fall color / leaf senescence BBCH 93	Oct 1-Nov 15	Leaves changing color; fall display beginning
Dormancy BBCH 97	Nov 15-Feb 28	Leafless; no active growth; dormant buds set

Diseases (5)

Podosphaera aphanis var. aphanis Powdery Mildew Rhizobium radiobacter (formerly Agrobacterium tumefaciens) Crown Gall Pseudomonas syringae pv. syringae Bacterial Blight Colletotrichum acutatum complex (C Anthracnose Raspberry bushy dwarf virus and related viruses Virus

Pests (14)

Unaspis euonymi Euonymus scale Common Leaf Spot Gray Mold Red Stele Aphidoidea Aphid Halyomorpha halys Brown marmorated stink bug Noctuidae Cutworms and Armyworms Tortricidae Leafroller Tetranychidae Spider mite Otiorhynchus spp. Root weevil Gastropoda Slug Cercopidae Spittlebug Drosophila suzukii Spotted-wing drosophila Pulvinaria floccifera Cottony camellia scale