Gardenia thunbergia (Starry Gardenia)
Gardenia thunbergia is a beautiful flowering shrub or small tree, with showy, heavily perfumed flowers and decorative fruits. Very similar to G. jasminoides with much slower growth rate , with a rigid look and single star shape flowers. The plant starts blooming only in mature age not before 5-6 years and only in the really warm condition. Sensitive to soil conditions needs acidic soil with good organic matter. Other than the landscape uses this plant is used as rootstock for other gardenias for sandy soil condition where the G. floribunda and G. jasminoides are very sensitive for different soil nematodes.
- Landscape Information
- Botanical Description
- Horticulture Management
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By Andrew massyn (Own work) [Public domain], via Wikimedia Commons
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By Afrodita_nz (Own work) [Public domain or Public domain], via Wikimedia Commons
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By Andrew massyn (Own work) [Public domain], via Wikimedia Commons
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French Name: Gardénia
Pronunciation: gar-DEEN-ee-uh thun-BER-jee-uh
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Plant type: Shrub
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Origin: South Africa
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Heat Zones: 9 to 12
Hardiness Zones: 8 to 11
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Uses: Hedge, Specimen, Mass Planting, Pollution Tolerant / Urban
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Size/Shape
Growth Rate: Slow
Tree Shape: Round
Canopy Symmetry: Symmetrical
Canopy Density: Dense
Canopy Texture: Medium
Height at Maturity: 3 to 5 m
Spread at Maturity: 3 to 5 meters
Time to Ultimate Height: 5 to 10 Years
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Foliage
Leaf Arrangement : Opposite
Leaf Venation: Brachidodrome
Leaf Persistance: Evergreen
Leaf Type: Simple
Leaf Blade: 10 - 20
Leaf Shape: Ovate
Leaf Margins: Entire
Leaf Texture: Waxy
Leaf Scent: No Fragance
Color(growing season): Green
Color(changing season): Green
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Flower
Flower Size Range: 3 - 7
Flower Type: Solitary
Flower Sexuality: Monoecious (Bisexual)
Flower Scent: Pleasant (Sweet)
Flower Color: Yellow
Seasons: Spring, Winter
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Trunk
Trunk Susceptibility to Breakage: Generally resists breakage
Number of Trunks: Multi-Trunked
Trunk esthetic Values: Not Showy
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Fruit
Fruit Type: Capsule
Fruit Size Range: 0 - 1.5, 1.5 - 3
Fruit Color: Orange
Seasons: Spring
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Tolerance
Heat Tolerance: Yes
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Requirements
Soil Requirements: Loam, Sand
Soil Ph Requirements: Acidic
Water Requirements: Moderate
Light Requirements: Full, Part
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Management
Pruning Requirements: Needed, to develop a strong structure
Fruit/ Leaves/ Flowers litter: No
Life Span: 25-50 years
Diseases: Powdery Mildew
Edible Parts: None
Pests: Mites, Thrips, Scales, Aphids, Mealy-Bug
Plant Propagation: Cutting, Layering