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Paraguay Nightshade, Blue Potato Bush
Scientific Name: Lycianthes rantonnei (Carrière) Bitter
Synonym: Solanum rantonnetii, Solanum rantonnei
Family: Solanaceae
Paraguay Nightshade, Blue Potato Bush (Lycianthes  rantonnei) Recommended Temperature Zone:
sunset: 12-13,15-27
USDA: 9-10

Frost Tolerance: Semi evergreen in Phoenix, needs some frost protection. In colder areas, it freezes to the ground in winter, and restarts in the spring

Heat Tolerance: Very good

Sun Exposure: Full sun

Origin: Paraguay, Brazil

Growth Habits: Sprawling, deciduous to evergreen, medium-sized shrub, fast growing up to 6-8 feet tall (1.8 to 2.4 m); alternate, elliptic to ovate, slightly rough-surfaced leaves, 1.6 to 6 inches long (4-15 cm), 0.8 to 3 inches wide (2-7.5 cm)

Watering Needs: Drought resistant, but does better with regular water, needs good drainage.


The Paraguay Nightshade is well adapted to the Phoenix heat. It is moderately frost sensitive, so it probably needs protected area. It grows rapidly to a medium size bush that stays loaded with purple flowers all year around.

Cultural Practices:
This Lycianthes enjoys regular watering and fertilizing. It also does better with a fair amount of organic matter in the ground.
It can be trained as a vine.

Blooming Habits:
The Paraguay nightshade produces deep violet blue flowers, 1 inch in diameter (2.5 cm), with a yellow center. They come in clusters, all year around if the temperature is warm enough.

Fruiting Habits:
The fruit is a berry.

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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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