Black nightshade
Solanum americanum · Solanaceae
The gardener's calendar
Ideal time to plant black nightshade: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Solanaceae
- Form
- Annual or short-lived perennial herb
- Adult size
- 30 to 60 cm in height
- Flowering
- July to October, small white flowers
- Foliage
- Deciduous, mid-green
- Growth
- Fast
- Hardiness
- Frost-tender, warm zones (10-12)
- Origin
- Tropical and subtropical America
Care
Light
Place your American nightshade in a sunny or partially shaded spot for generous flowering. It tolerates light shade well but will flower less abundantly. Protect it from strong winds that can damage its delicate stems.
Watering
Keep the soil regularly moist without becoming waterlogged. Water deeply 2 to 3 times per week during active growing season, more often in hot weather. Reduce watering in winter if the plant is grown in a temperate climate.
Soil
Prefer rich, well-draining soil that is slightly acidic to neutral. A potting mix enriched with organic matter promotes vigorous growth. Ensure good drainage to prevent root rot.
Fertilizing
Apply balanced fertilizer every 2 to 3 weeks during the growing period (spring-summer). Excess nitrogen promotes foliage at the expense of flowering: choose a formula rich in phosphorus and potassium instead.
Pruning
Pinch back young stems regularly to encourage a bushy habit. Remove spent flowers and yellowing leaves to prolong flowering. Light pruning at the start of the season stimulates branching.
Diseases and pests
Watch for aphids and whiteflies, which are common on this species. Powdery mildew can occur in air that is too dry or humid. Ensure good air circulation and remove affected parts at the first sign.
Did you know?
American nightshade is a close relative of tomato and potato, sharing with them the Solanaceae family. Although it produces small black berries, these should never be eaten without certain identification: the Solanum genus contains toxic species, and only certain tropical regions use it traditionally in cooking. Its introduction to Europe dates back to the botanical exchanges of the 16th-17th century.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- TomatoSolanum lycopersicum
- Sweet pepperCapsicum annuum
- EggplantSolanum melongena
- Cape gooseberryPhysalis peruviana
- Night jessamineCestrum nocturnum
- Potato vineSolanum laxum
Tips generated and checked by Viridia — adapt them to your local climate.