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Hydrangea arborescens Annabelle

Common Name(s):

Smooth hydrangea

Wild hydrangea

Synonym:

​

Sevenbark

Flower:

White

Blooms :

May

to:

Sep

Tiny white flowers in head-like clusters 8-10" across

Botanical Description

Fragrant?

NO

Family:

Hydrangeaceae

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

Foliage:

Green

Leaves opposite, oval, egg-shaped rounded, toothed

Fall Color?

YES

Leaves turn yellow in fall

Deciduous

Photo by: 

Heading 6

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Oregon Native?

NO

West State Native?

NO

Origins:

New York west to Iowa and south to Louisiana

Site Selection

Minimum USDA Hardiness Zone:

3

Water Needs:

M

Sun Needs:

Full Sun

Deer Resistant?

YES

Firewise?

YES

Height:

3-5'

Spread:

4-6'

Growth Rate:

Medium

Native Habitat:

Moist rocky woodlands, skopes, ravines, streambanks

Soil:

Average moist well-drained

Care Recommendations

Maintenance Level:

Low

Fertilizer:

Apply early spring, compost, fish emulsion, rose food work well

Mulch:

2-3" of compost, or organis mulch around base in fall for winter protection

Consistent moisture, correct lighting (morning sun/afternoon shade), annual pruning to 12-18" or near ground, support cages if needed

Long Term:

Winter:

None if fall chores provide protection from winter cold

Spring:

Prune dead or damged stems, apply mulch, provide water, can cut back as much as one third just before leaf emergence

Summer:

Ensure mulch has been spread, fertilize lightly, check for pests

Fall:

Prepare for dormancy by applying mulch to protect roots

General Care Comments:

Regular watering, mulching for moisture retention, balanced fertilizer in spring, managing for pests

Common Problems

Flopping habit, high water dependency, heat stress

Diseases:

Powdery mildew, leaf spots, grey mold,

Insects:

Aphids, spider mites. scale. hydrangea leaftier moth

Environmental Problems:

Sterile flowers that lack pollen and nectar

Pests:

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