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HYDRANGEA serrata 'Kiyosumi'
Commonly known as Hortensia
Pinkish-white flowers with white florets tinged and edged red
Further Reading....
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DeciduousNarrowly ovate, pointed leaves to 15cm (6in) long, chocolate-coloured when young
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WhitePinkish white
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Height1.2m (4ft)
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Spread1.2m (4ft)
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Medium shrubTypically grow to around 4-6 feet in heightCompact, erect shrub. Produces fertile and sterile flowers in flattened corymbs 5-10cm (2-4in) across
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Hardy - average winterHardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F)
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Full sunShelter from cold, drying winds
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Partial shade
HYDRANGEA serrata 'Kiyosumi'
- Details
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Additional FeaturesGood to knowOriginally found in the wild in JapanPests & DiseasesRed spider mites, scale insects, vine weevils, capsid bugs, grey mould(Botrytis), Hydrangea virus, powdery mildew, leaf spot, honey fungusPlace of originKorea, Japan
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Burncoose SpecialitiesHydrangeas
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Flower ShapeLacecap
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Garden Location/ConditionsSuitable for small gardens
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HardinessFrost hardy (down to -5)
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Leaf marginSerrate
(see photos above) -
Leaf shapeOvate
(see photos above) -
Pruning groupPruning group 3Suitable for: Deciduous shrubs that flower in the Summer or Autumn on previous year's growth, or deciduous shrubs that flower in late Winter-Spring on previous year's growth.
Pruning: Trim off old flowers to the first bud beneath flower head. Cut back 1/3 of the oldest stems to promote replacement growth.
When: Annually
RHS group 4 -
Seasonal InterestAutumnSummer
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Soil ConditionsFertile moist well-drained soilModerately fertile. Humus-rich.
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Toxic - Category CMay cause skin allergy(People & Pets) Maybe harmful to pets if eaten
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WildlifeRabbit Resistant
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Hydrangeas - Care Guide
- Hydrangeas for everyone!
- Quick tour of hydrangea stocked - Video Tip ondemand_video
- Soil & Feeding
- Pruning Hydrangeas
- Pruning Hydrangeas - Video Tip ondemand_video
- Hydrangeas, keeping them blue - Video Tip ondemand_video
- Propagation
- Drying Flower Heads
- Drying hydrangea flower heads - Video Tip ondemand_video
- Popular Mopheads & Lacecaps
- Hydrangeas and other plants
- Further Reading
Hydrangeas - Video Spotlights
1.2m (4ft)
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1.2m (4ft) |
Useful extras...

Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00

Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00

Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50

Fertilisers & Feeds - Vitax
Hydrangea Colourant
For changing pink hydrangea flowers to blue, or making blue flowers darker. If your soil is alkaline the proportions should be doubled.
Only £6.50

Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20

Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.20