Black nightshade (Solanum interius)
Care, watering, light and tips for Black nightshade on Floravia.
Quick facts
- Family: Solanaceae
- Difficulty: Easy to care for
- Watering: every 3 days
- Light: Full sun
- Temperature: 10–35 °C
- Toxicity: Toxic to pets
About Black nightshade
Solanum interius, commonly known as plains black nightshade, is an annual or short-lived perennial herbaceous plant native to North America. It is characterized by its small, star-shaped white flowers and spherical, glossy black berries when mature. While often considered a weed, it can be an interesting addition to wildlife gardens or edible hedgerows (ripe berries are edible, but unripe ones and the rest of the plant are toxic).
Native range
North American plains, from central Canada to the central United States
Care tips
This species thrives in full sun to partial shade, tolerating a wide range of light conditions. It requires moderate watering, allowing the soil to dry out slightly between waterings, and is quite drought-tolerant once established. It prefers well-drained soils, from sandy to clay. A common mistake is to confuse its berries with other toxic Solanum species; only fully ripe Solanum interius berries are edible, and always with caution.
How to save a dying Black nightshade
- Warning signs
- Yellowish or pale leaves, stunted growth, general wilting, dry and prematurely fallen berries.
- First aid
- Move to partial shade, water if substrate is dry, check for pests (mites, aphids) and remove them with soapy water.
- What kills it
- Excessive direct sun and lack of water in summer, causing rapid dehydration; or waterlogging, which rots its roots.
- Can it be saved?
- Yes, if you act quickly. It's a resilient plant. Remove heavily damaged parts and maintain proper watering and light.