Clethra, Summersweet, Sweet Pepper Bush 'Sixteen Candles'

Clethraalnifolia

Genus
Clethra (KLEE-thra)
Species
alnifolia (al-nee-FOH-lee-uh)
Synonym
Sun Exposure
Sun to Partial Shade
Foliage
Deciduous
Height
4-6 ft. (1.2-1.8 m)
Spacing
24-36 in. (60-90 cm)
Hardiness
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
N/A
Bloom Color
White/Near White
Bloom Time
Late Summer/Early Fall
Other Details
Category
Shrubs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Propagation Methods
From softwood cuttings
By tip layering
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Douglas, Georgia

Social Circle, Georgia

Lake Forest, Illinois

Mc Dowell, Kentucky

Silver Spring, Maryland

Beverly, Massachusetts

Lexington, Massachusetts

Royal Oak, Michigan

Cary, North Carolina

Wilmington, North Carolina

Lancaster, Pennsylvania

Roscoe, Pennsylvania

West Chester, Pennsylvania

Conway, South Carolina

Chattanooga, Tennessee

Murchison, Texas

Midlothian, Virginia

South Boston, Virginia

Puyallup, Washington

Spokane, Washington

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Gardener's Notes:

1
positive
1
neutral
0
negative
Sort By:
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T
Montreal, QC (Zone 4b) | June 2020 | neutral

I was planning a fragrant garden in our part shade sandy soil/ zone 4.
It is hardy, easy to grow and no fuss. However it is not f...Read More

R
Downingtown, PA | July 2015 | positive

This is a newer cultivar that is a dwarf form that gets about 3 feet high and at least 4 feet wide, and wider in time. It suckers some in...Read More

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(Accipiter cooperii)