Flannel Bush

Fremontodendron californicum

Malvaceae, formerly Sterculiaceae · broadleaf evergreen tree · introduced

Last updated May 24, 2026

Quick Facts

Height

20 ft

Spread

13 ft

Growth Rate

Moderate

Light

Full Sun

Soil

Well Drained

Water

Low

Hardiness

Zones 8a–8b

Bloom Time

May to June

Origin

North America

View full calendar (5 stages)

Stage	Typical Window	What to Look For
New growth flush BBCH 11	Feb 15-Mar 15	Lighter-colored new growth visible at branch tips
Bloom start BBCH 61	Aug 1-Aug 31	First open flowers visible; flowers yellow
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: black
Fruit/seed maturity BBCH 85	Sep 1-Nov 30	Fruit fully colored and ripened; seed dispersal may begin

Data Maturity

Baseline Extension data. Expert review underway.