Mountain Spray

Holodiscus dumosus

Rosaceae · broadleaf · introduced

Quick Facts

Height

5–20 ft

Growth Rate

Moderate

Light

Full Sun

Soil

Well Drained

Water

Low

Hardiness

Zone Zones 3a–8b

Bloom Time

Aug 1-Aug 31

Origin

extends from central Idaho south to southern Arizona and the Big Bend region of Texas and east to the edge of the plains grasslands in east-central Wyoming

Phenological Calendar

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

Diseases (1)

Various fungi (Phyllosticta spp., Septoria spp., Cercospo... Leaf Spot