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GARDENIA augusta 'Crown Jewel'
Commonly known as Cape jasmine
Double white perfumed flowers. Frost hardy
Further Reading....
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EvergreenOvate, elliptic or lance-shaped, glossy, deep green leaves to 10cm (4in) or more long usually carried in whorls of 3.
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White -
Height1m (39in) -
Spread75cm (30in)
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Medium shrubTypically grow to around 4-6 feet in height
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Half hardy - unheated greenhouse / mild winterHardy in coastal and relatively mild parts of the UK except in severe winters and a risk from sudden (early) frosts. May be hardy elsewhere with wall shelter or good micro-climate. Likely to be damaged or killed in cold winters. Plant can withstand temperatures down to -5°C (23°F) -
Partial shadeOr light, dappled shade
GARDENIA augusta 'Crown Jewel'
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Additional Features
Good to knowA good subject for a container in areas with cold winters. Can be moved into protection.
Pests & DiseasesUnder glass - whiteflies, stem and root mealybugs, grey mould
Place of originChina, Taiwan, Japan -
Flower ShapeDoubleMulti rows of petals, no stamen showingSaucer-shapedTo 8cm (3in) across
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Garden Location/ConditionsGreenhouse / conservatoryNot the sort of plants to be grown outside where there are likely to be frosts. These plants need to be grown in a conservatory or cool greenhouse or at least brought inside for the winterUnder glass use ericaceous compost in full light. Keep barely moist in winter. Might require restrictive pruningPatio / pot plantsSuitable for small gardens
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HardinessFrost hardy (down to -5)
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Leaf margin
Entire(see photos above) -
Leaf shape
Elliptic
(see photos above) -
Pruning group
Pruning group 6Suitable for: Evergreen shrubs or climbers that need little to no pruning.
Action: Trim back shoots that spoil symmetry and to fit available space.
When: Annually after flowering if on previous year's growth, or in later Winter or Spring if flowering on current year's growth, or as requires.
RHS group 9 & 11 -
Scented PlantsScented flowers
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Seasonal InterestAutumnSummer
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Soil ConditionsFertile moist well-drained soilHumus-rich.Neutral to acid soil
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Gardenia - Care Guide
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1m (39in)
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75cm (30in) |
Useful extras...
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
Vermin & Pest Control
SB Plant Invigorator
This is a non-biological non-chemical plant insecticide and mildewcide.
Works against the physical motion of the insect. Perfect for all plants and edible crops.
Only £9.00
Garden Goodies
Max/Min Digital Thermometer
Thermometer which displays current temperature in the centre, with Max above and min below.
Suitable for use outdoors or in the greenhouse / conservatory.
With batteries included
Only £20.00
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