A brief introduction
Lobelia, with its striking blue, purple, red, and white flowerheads originating in North America, lobelia has been admired and utilized for its ornamental and medicinal properties for centuries. The genus Lobelia is named after the Flemish botanist Matthias de L'Obel, who studied plants extensively in the 16th century. Lobelia consists of over 400 species and can live in a wide variety of landscapes.
Popular varieties
Lobelia erinus ~ A popular one known for its trailing habit, making it perfect for hanging pots. It features small flowers in a wide range of colours.
Lobelia cardinalis ~ Tall spikes of bright red flowers, ideal for garden beds.
~ The Symbolic meanings of Lobelia ~
Lobelia symbolizes love and admiration, reflecting its delicate and vibrant appearance.
Soil
Lobelia prefers rich, well-draining soil with ample organic matter. A slightly acidic to neutral pH (6.0-7.0) helps ensure optimal growth. Adding compost can improve soil fertility and moisture retention.
Light
Lobelias thrive in partial to full sun. While they can tolerate full sun in cooler climates, in hotter regions, they benefit from some afternoon shade to prevent wilting. Ideal temperature: 18-28°C.
Watering
These plants enjoy consistently moist soil but should not be waterlogged. Regular watering is necessary, particularly during dry periods, as lobelias can dry out quickly and may stop blooming if too parched.
Care
Pinching back stems early in the growing season encourages bushier growth and more blooms. Deadheading spent flowers helps maintain the plant's appearance and promotes continued flowering. Lobelias generally require minimal fertilizing; a light feeding with a balanced fertilizer can enhance growth.
Good for Pollinators: Yes
Toxic to pets: Yes
Fragrant: No
Care difficulty: Easy
Did you know?
Lobelia is admired for its beauty and has historical uses in traditional medicine. Lobelia inflata, also known as Indian tobacco, was once used by Native Americans for various medicinal purposes, although its usage should be approached with caution due to potential toxicity. Lobelia is also an excellent weed suppressor and can be very useful in difficult areas that can be hard to cultivate.