Clethra alnifolia 'Crystalina' (Sugartina® Summersweet)


Botanical Information

FamilyClethraceae
GenusClethra
Speciesalnifolia
Cultivar'Crystalina'
Registered NameSugartina®
Patent NumberPP21,561
CategoryWoody
TypeShrub (deciduous)
OriginBred at North Carolina State University, selected from Clethra alnifolia 'Ruby Spice', United States Plant Patent issued December 7, 2010.

Details

USDA Hardiness Zone4
USDA Hardiness Ref.
Canadian Hardiness Zone2 - 5a
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-35 - (-29)
Temperature (°F)-30 - (-20)
Height90 cm
Spread90 cm
Flowering PeriodJuly, August

Description and Growing Information

General DescriptionA dwarf summersweet with fragrant white flowers and dark glossy green foliage that turns yellow in autumn.
ShapeRounded habit.
LandscapeGreat for mass plantings or shrub borders, and is effective as a hedge.
PropagationPropagate by cuttings.
CultivationGrow in full sun or partial shade in an average, medium to wet soil. Prefers partial shade and consistent moisture (should not be allowed to dry out). Will tolerate clay soil and full shade. Any pruning should be done in late winter.
PestsNo serious pests or diseases, although spider mites may be a problem in dry conditions.
HabitatHorticultural origin.
Leaf DescriptionLeaves are a glossy dark green, to 7-10 cm in length, turning variable shades of yellow to golden brown in autumn.
Flower DescriptionFlowers bloom in narrow, upright panicles on the current years growth, are sweetly fragrant, and pure white. They are very attractive to butterflies and bees.
Fruit DescriptionDark brown seed capsules that may last into winter.

Photographs