Deutzia gracilis 'Nikko' (Nikko Slender Deutzia)


Michael's Opinion

The Nikko deutzia is a very appealing plant when in full flower, The large white racemes that literally engulf the plant are quite aesthetically pleasing. However the majority of the year the plant looks quite ratty and becomes unkempt over time so consistent renewal pruning is required to maintain a desirable form. All in all a nice plant when in bloom, nothing more.

Botanical Information

FamilyHydrangeaceae
GenusDeutzia
Speciesgracilis
Cultivar'Nikko'
CategoryWoody
TypeShrub (deciduous)
OriginAwarded a Gold Medal by the Pennsylvania Horticulture Society.
Pronunciation

Details

USDA Hardiness Zone8b - 9a
USDA Hardiness Ref.
Canadian Hardiness Zone8b
Canada Hardiness Ref.
RHS Hardiness ZoneH5 (Observed growing well in H7 in a protected location)
RHS Hardiness Ref.
Temperature (°C)-15 to -10
Temperature (°F)5 - 14
Height0.6 m
Spread1 m
GrowthMedium
Flowering PeriodMay

Description and Growing Information

General DescriptionDwarf compact shrub, small leaved, simple, opposite, oblong-lanceolate leaf, medium fine texture in leaf, flowers are perfect, double flowering, white, borne in upright racemes 5-8 cm long, gray exfoliating bark, dehiscent, brown fruit.
ID CharacteristicDouble flowering white racemes, blue green foliage, deep purple or burgundy in autumn.
ShapeLoosely rounded and somewhat unkempt.
LandscapeInformal rock gardens or as a mass planting or groundcover plant.
PropagationSoftwood cuttings.
CultivationDeutzias are rooted from softwood cuttings, these can be collected at any point of the growing season, typically use 1000 ppm KIBA dip, place in misting bed and root systems should be well developed in approximately 3-4 weeks, should be container grown.
PestsThe Nikko Deutzia is susceptible to leaf spot, aphids and leaf miners.
Notable SpecimensThe Mac Cuddy Garden Botanic, Strathroy, Ontario, Canada. The Gardens of Fanshawe College, London, Ontario, Canada.
HabitatHorticultural origin.
Bark/Stem DescriptionYoung stems herbaceous, older stems becoming gray and exhibiting an exfoliating bark habit.
Flower/Leaf Bud DescriptionBrown, glossy, ovoid shaped, nearly sessile with several pairs of outer scales.
Leaf DescriptionSimple, unevenly serrate, lanceolate-obovate leaf shape, bluish-green in colour, purple or burgundy autumn colour.
Flower DescriptionDouble flowering 5-8 cm racemes borne upright, perfect, weakly fragrant, pure white colour, flowers mid-late May, needs summer heat to bloom effectively.
Fruit DescriptionA dehiscent, brown capsule.
Colour DescriptionBlue green foliage throughout spring and summer, dark purplish or burgundy autumn foliage, bears white flowers.
Texture DescriptionMedium-fine in foliage, medium in winter.

Photographs