SOLANUM

Commonly known as Blue potato bush, Paraguay nightshade

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Genus of about 1400 species of annuals, herbaceous perennials, and evergreen, semi-evergreen and deciduous shrubs, trees and twining climbers from a worldwide range of habitats. Includes the potato, tomato and aubergine familes.

Natives comprise the 2 nightshades S. dulcamara, woody nightshade or bittersweet and S. nigrum, black nightshade. Atropa belladonna, deadly nightshade, although in the same family is a different, distinct plant.

Further Reading....

Solanum - Growing Guide

Details
Mature Size
Tips and Advice
Goes Well With
Planting Combinations
Other Suggestions
See Also...

Evergreen
Ovate to lance-shaped, often wavy-margined, smooth, mid- to deep-green leaves 6-10cm (2½in) long
Blue
Blue purple
Height
2m (6½ft)
Spread
2m (6½ft)
Medium shrub Typically grow to around 4-6 feet in height
Lax shrub, usually many-branched when mature. Produces axillary clusters to 6cm (2½in) across of 2-5 shallowly trumpet-shaped, flowers1-2.5cm (½-1in) across followed by ovoid red fruit 2.5cm (1in) long.
Half hardy - unheated greenhouse / mild winter Hardy 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)
Full sun
Caution, toxic if eaten Do not eat these plants.
Additional Features
Pests & Diseases - under glass - aphids, red spider mite, tomato spotted wilt, grey mould.
Place of origin
Paraguay, Argentina
Resistant to honey fungus - These plants have little or few problems with honey fungus.
Hardiness
Frost hardy (down to -5)
Pruning group
Pruning group 8
Suitable for: Wall trained shrubs and less vigorous climbers.
Action: For climbers 'spur prune' by cutting back 3-4 buds of the permanent framework. For wall trained shrubs cut back flowered shoots to within 2-4 buds of permanent framework.
When: Annually after flowers if on previous year's growth, or in late Winter or Spring if on current year's growth.

RHS group 12 & 13
Seasonal Interest
Autumn
Summer
Soil Conditions
Fertile well drained soil
Neutral to alkaline soil