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Chamaebatiaria millefolium

Common Name(s):

Desert Sweet

Fern Bush

Synonym:

Sorbaria millefolium

Tansybush

Flower:

White

Blooms :

Jun

to:

Aug

White showy, about 1 cm wide with 5 petals in long terminal clusters

Botanical Description

Fragrant?

YES

Family:

Rosaceae

Med - Lg Shrub (usually >3' and never < 1.5')

Foliage:

Yellow-Green

Leaves alternate, small, 2-8 cm long and compound giving a fern like appearance

Fall Color?

YES

Foliage remains a muted olive-green, the flower heads mature to rusty brown or coppery seed pods, cinnamon bark

Deciduous

Photo by: 

Heading 6

Capsule like fruit splits open at maturity and persists through the winter

Oregon Native?

YES

West State Native?

YES

Origins:

Native range from east of the Cascades and Sierra Nevada Mountains from Deschutes County to southern California, east to Idaho, Nevada, Utah, Arizona and New Mexico

Site Selection

Minimum USDA Hardiness Zone:

4

Water Needs:

VL

Sun Needs:

Full Sun

Deer Resistant?

YES

Firewise?

NO

Height:

2-7'

Spread:

3-6'

Growth Rate:

Medium

Native Habitat:

Resident of scrub, woodland, and forests in western North America

Soil:

Sandy or loamy soils. Does not grow well in clay soils.

Care Recommendations

Maintenance Level:

Low

Fertilizer:

A light application of compost can be applied early spring

Mulch:

Pea gravel, landscape rock (5/8" minus or smaller), crushed rock

Benefits from deep watering during extrenely hot dry periods, needs well-drained soil, light pruning in late winter/early spring

Long Term:

Winter:

No watering

Spring:

Prune to maintain shape, remove any winter damaged stems, remove or compost old unsightly yellowish-brown seed heads, give occassional watering if dry

Summer:

Water rarely, give full sun, no pruning or fertilizer

Fall:

Drastically reduce or stop irrigation, leave seed heads

General Care Comments:

Only needs deep watering during extreme drought, needs full sun, excellent drainage, light pruning in spring

Common Problems

Too much or too little water, can get sprawly, can cause icy patches to form on walkways, too deeply planted

Diseases:

Wilt if over-watered

Insects:

Host plant for Nuttal's sheep moth

Environmental Problems:

Dislikes clay soils

Pests:

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COMGA

Email:

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In reference to publications, events, or activities: Publications will be made available in accessible formats upon request. Please contact us if you have a physical disability that requires an accommodation in order for you to attend the event/activity, please notify the Deschutes County Master Gardener program at phone/email.

Oregon State University Extension Service prohibits discrimination in all its programs, services, activities and materials on the basis of race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, familial/parental status, income derived from a public assistance program, political beliefs, genetic information, veteran’s status, reprisal or retaliation for prior civil rights activity. (Not all prohibited bases apply to all programs.)

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