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Climber Wall ShrubConservatory GreenhouseShrubs

Lycianthes rantonnetii

blue potato bush

A lax, evergreen shrub producing clusters of lightly fragrant, purple-blue, funnel-shaped flowers in summer and autumn. These are followed by red berries

Synonyms
Solanum rantonnetii
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Size
Ultimate height
1.5–2.5 metres
Time to ultimate height
2–5 years
Ultimate spread
1.5–2.5 metres
Growing conditions
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Green
Autumn Blue Green Red
Winter Green
Position
  • Full sun
Aspect

South–facing or West–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Solanaceae
Native to GB / Ireland
No
Foliage
Evergreen
Habit
Bushy
Potentially harmful
All parts can cause severe discomfort if eaten. Wear gloves and wash hands after handling
Genus

A genus of around 150 diverse species of flowering shrubs, native to tropical America, Asia and the Pacific. They have green foliage and flowers which can be cup or star-shaped in shades of purple, white or pink

Name status

Correct

Plant range
Paraguay, Argentina

How to grow

Cultivation

May survive as a wall-shrub in very mild areas, or grow as a standard in a pot and take under cover for winter. Otherwise grow in a cool greenhouse or conservatory with shade from the brightest sun and moderate humidity. Plants will require support

Propagation

Propagate by seed, or semi-ripe cuttings taken in summer or early autumn and rooted with gentle bottom heat

Suggested planting locations and garden types
  • City and courtyard gardens
  • Patio and container plants
  • Mediterranean climate plants
  • Wall side borders
Pruning

Pruning group 9 if freestanding or pruning group 12 as a wall shrub

Pests

May be susceptible to aphids and glasshouse red spider mite whilst under glass

Diseases

Prone to grey moulds under glass

Get involved

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