Look closely at those vibrant violet-blue blooms, and you’ll notice a golden-yellow star glowing at the centre of each one. The Blue Potato Bush, also known as Paraguay Nightshade, is a fast-growing, evergreen shrub with a rounded, bushy form and slender, arching branches clothed in small, oval, medium-green leaves. From spring through autumn (and often year-round in mild coastal gardens), it produces an abundance of trumpet-shaped flowers in striking bright blue-purple, each with that distinctive starry golden eye. Small, ornamental, orange-red berries follow, adding further interest and attracting birds.
Native to South America (Argentina, Bolivia, Brazil, and Paraguay), this adaptable plant thrives in South African gardens. It needs full sun—at least 6 hours of direct light for the most abundant display; too much shade results in sparse, leggy growth. It adapts to most well-drained soils, from sandy to loamy, and once established, is remarkably drought-tolerant, though it flowers best with regular water. It tolerates cold and light frost. Reaching 1.5–2.5m tall and wide, it’s perfect for mixed borders, informal hedges, screening, or training against a fence. It’s also excellent as a stunning “standard” or “lollipop” tree in a large container.
Key Features:
- Masses of vibrant violet-blue flowers with sunny yellow centres from spring through autumn
- Bright, nectar-rich blooms irresistible to bees and butterflies
- Fast-growing and informal—excellent for quick filling, lush hedges, or screening
- Can be grown as a shrub, trained against a fence, or pruned into a standard tree
Gardening Note: Plant in full sun in well-drained soil. Water regularly until established; mature plants are drought-tolerant but flower best with occasional deep watering during dry spells. Prune back heavily after each major flowering flush to encourage continuous blooms and maintain a compact shape. Too much water or nitrogen-rich fertiliser results in lush foliage at the expense of flowers—a potassium-rich fertiliser is preferred.
