Heptacodium miconioides (Seven Son Flower)


Michael's Opinion

As unusual shrub since it is late flowering. Somewhat ungainly in appearance, it is a suitable candidate for the back of the border. In the winter the exfoliating bark is quite stunning. A choice plant!

Botanical Information

FamilyCaprifoliaceae
GenusHeptacodium
Speciesmiconioides
CategoryWoody
TypeShrub (deciduous)
OriginNative to China, originally introduced in 1907 to North America.
Pronunciation

Details

USDA Hardiness Zone7b - 8a
USDA Hardiness Ref.
Canadian Hardiness Zone7
Canada Hardiness Ref.
RHS Hardiness ZoneH5-H7
RHS Hardiness Ref.
Temperature (°C)-15 - (-9)
Temperature (°F)5 - 15
Height5 - 7 m
Spread2.5 – 3.25 m
GrowthFast
Flowering PeriodAugust

Description and Growing Information

General DescriptionMulti-stemmed, upright. Distinctly veined leaves. Flowers in late summer to early autumn.
ID CharacteristicExfoliating tan bark, late summer white flowers, red sepals in late autumn, leaves have 3 main parallel veins.
ShapeMulti-stemmed & single stemmed, upright branching. Develops loose, rounded/irregular form & unkempt.
LandscapeUsed in large borders or in groups as an island planting.
PropagationSeeds require 5 months warm and 3 months cold. July cuttings 10 to 15cm long, 10,000ppm IBA, with 81% rooting by October.
CultivationBest in full sun, soil adaptable, but prefers moist, well drained fertile soil. Easily transplanted and grown, may need pruning to tame errant shoots, and form ungainly.
PestsStem dieback possibly due to canker. Plants in shade seem to develop retained sepals.
Notable SpecimensThe Gardens of Fanshawe College, London, Ontario, Canada and The A.M Cuddy Gardens, Strathroy, Ontario, Canada. Westonbrit Arboretum, Tetbury, England.
HabitatZhejiang Province in China, found in well drained fertile soil.
Bark/Stem DescriptionGrey brown, exfoliating on 1.25 -2.55 cm diameter stems to reveal a tan bark. Attractive, bark comes off in strips, and is reminiscent of crape myrtle or beautybush.
Flower/Leaf Bud DescriptionImbricate, light brown, glabrous, ovoid, 4 - 7 mm long, forming 45 degree angle with stem.
Leaf DescriptionThe most beautiful part of the plant, emerging early, soft green maturing to dark green, retained late into November, poor autumn colour, yellow at best. Simple deciduous leaves, opposite leaf arrangement, 5 -15 cm long, half as wide, rounded apex.
Flower DescriptionFragrant white small flowers, born in 15.24 cm long panicles, bloom late August and September, showy and may attract butterflies. Sepal's are a dull red/brown to burgundy.
Fruit DescriptionCapsules that can retain sepals, sepals change from green to burgundy and last up to 3 weeks, sepals are as showy as flowers.
Colour DescriptionDark green in summer, yellow in autumn, flowers are white, bark is grey brown.
Texture DescriptionMedium – medium coarse

Photographs