PlantFiles: Summersweet, Sweet Pepper Bush Clethra alnifolia 'Ruby Spice'
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Hardiness: USDA Zone 3b: to -37.2 °C (-35 °F) 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)
Bloom Time: Late Spring/Early Summer Mid Summer Late Summer/Early Fall
Other details: This plant is attractive to bees, butterflies and/or birds Flowers are fragrant Average Water Needs; Water regularly; do not overwater
Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral)
Patent Information: Non-patented
Propagation Methods: From softwood cuttings From seed; direct sow outdoors in fall From seed; winter sow in vented containers, coldframe or unheated greenhouse By simple layering By serpentine layering
On Aug 12, 2008, passiflora_pink from Indian Springs, AL (Zone 8a) wrote:
Blooms mid summer, when spring flowers have faded. Attracts pollinators of all sorts. Sweet perfume is delightful from several feet away. New growth comes from roots so can be used on a bank to help with erosion.
The last to put out its leaves in the Spring in my yard, it pays back the late foliage with beautiful unusually deep pink spires that fill the yard with a wonderful scent. This plant goes in all lighting conditions from full shade to full sun. Can also be grown at the seashore. Leaves are luscious deep green turning bright yellow in the fall. Branches have an interesting sinuous growth habit. A winner all-round.
On May 26, 2005, sterhill from Atlanta, GA (Zone 7b) wrote:
Atlanta - I have had this plant in full sun - full, HOT, afternoon sun - for two or three years and it has done well here. I did not know it wanted to be moist and did not water it, as it exceeded the reach of my hose. It still did pretty well, but now that I have a new 100' hose and KNOW now it wants more water, it is looking much fuller and happier! Probably the blooms will last longer also.
On May 11, 2005, braun06 from Peoria Heights, IL (Zone 5b) wrote:
I have been quite pleased with this cultivar. Though late to leaf out it has beautiful dark blue green leaves. The plant starts flowering in early to mid july here in Illinois. It continually blooms for a month. The flowers may not be extremely fragrant at first but eventually develop a wonderful spicy sweet aroma that carries throughout the yard. These shrubs are also very useful for some excellent yellow fall color that is not too common in shrubs. I have planted this shrub in places that offer afternoon shade or full sun on other plaves on a steep slope. Have not noticed any leaf scorch or wilting and supplied limited irrigation during dry periods and probably wouldnt be necessary at all in my yard.
On Aug 31, 2001, smiln32 from Oklahoma City, OK (Zone 7a) wrote:
Easily grown in average, medium wet to wet, well-drained soil in full sun to part shade. Adaptive to wide range of soil, moisture and light conditions. Prefers part shade and consistently moist to wet, acidic soils. Tolerates full shade, however. Spreads slowly by rhizomes
On Mar 9, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:
Fragrant deep pink flowers on glossy green foliage appear in late summer. Grows naturally in wet places; plant in moist acid soil amended with organic matter. Grows best in partial shade. A favorite of butterflies and hummingbirds. Introduced by Broken Arrow Nursery in CT.
Slow to medium growth rate. If necessary, prune in early spring.
This plant has been said to grow in the following regions:
Indian Springs Village, Alabama Vincent, Alabama Anchorage, Alaska Sherwood, Arkansas Sacramento, California Westport, Connecticut Dewey Beach, Delaware Ocean View, Delaware Umatilla, Florida North Decatur, Georgia Winterville, Georgia Hanna City, Illinois Iowa City, Iowa Hancock, Maine Beverly, Massachusetts Mashpee, Massachusetts Wellfleet, Massachusetts Wrentham, Massachusetts East Tawas, Michigan Pleasant Lake, Minnesota St Paul, Minnesota Hudson, New Hampshire Haddonfield, New Jersey Averill Park, New York Baxter Estates, New York Beacon, New York Elba, New York Nineveh, New York North Tonawanda, New York Old Field, New York Red Oaks Mill, New York Elizabeth City, North Carolina Raleigh, North Carolina Fredericktown, Ohio Fruit Hill, Ohio North Canton, Ohio Ashley, Pennsylvania Bradford, Pennsylvania Quakertown, Pennsylvania West Wyoming, Pennsylvania College Grove, Tennessee Maryville, Tennessee Murfreesboro, Tennessee East Highland Park, Virginia Orlean, Virginia East Port Orchard, Washington Kalama, Washington Walnut Grove, Washington Mount Pleasant, Wisconsin