Lobelia erinus

Lobelia erinus, commonly known as trailing lobelia, is a species of flowering plant in the bellflower family Campanulaceae. It is native to southern Africa, where it grows in a variety of habitats. This plant is widely cultivated for its attractive flowers and is often used in hanging baskets, window boxes, and as a ground cover in gardens.

Description

Lobelia erinus is a small, herbaceous perennial plant, often grown as an annual in temperate climates. It typically reaches a height of 10–25 cm (4–10 in) and spreads to about 15–30 cm (6–12 in). The plant has a trailing habit, making it ideal for cascading over the edges of containers.

The leaves of L. erinus are small, alternate, and ovate to lanceolate in shape, with a slightly serrated margin. The stems are slender and may be green or purplish in color.

The flowers are the most distinctive feature of Lobelia erinus. They are small, about 1–2 cm in diameter, and come in a variety of colors including blue, purple, white, and pink. The flowers are bilaterally symmetrical, with a two-lipped corolla. The upper lip consists of two small lobes, while the lower lip has three larger lobes. The flowering period is typically from spring to autumn.

Cultivation

Lobelia erinus is a popular ornamental plant due to its vibrant flowers and ease of cultivation. It prefers a sunny to partially shaded location and thrives in well-drained, fertile soil. Regular watering is essential, especially during dry periods, to maintain its lush appearance.

Propagation is usually done by seed, which can be sown indoors in early spring or directly in the garden after the last frost. The seeds are very small and should be sown on the surface of the soil without covering them, as they require light to germinate.

Uses

In addition to its ornamental use, Lobelia erinus has been studied for its potential medicinal properties. Some species of the genus Lobelia have been used in traditional medicine, although L. erinus itself is not commonly used for this purpose.

Pests and Diseases

Lobelia erinus is generally resistant to pests and diseases, but it can be susceptible to aphids, slugs, and snails. Overwatering or poor drainage can lead to root rot and other fungal diseases.

Also see

• Lobelia
• Campanulaceae
• Ornamental plants
• Perennial plant
• Annual plant