Cardinal flower (Lobelia cardinalis)
Care, watering, light and tips for Cardinal flower on Floravia.
Quick facts
- Family: Campanulaceae
- Difficulty: Moderate care
- Watering: every 3 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Cardinal flower
Lobelia cardinalis, commonly known as Scarlet Lobelia, is a striking aquatic or wetland perennial native to the Americas. It is renowned for its vibrant spikes of intense cardinal red flowers that attract hummingbirds and butterflies. It is ideal for pond margins, rain gardens, or as an accent plant in sunny, moist areas.
Native range
North America and Central America
Care tips
It thrives in full sun to partial shade, with more abundant flowering occurring in brighter conditions. The soil must be consistently moist to even wet, rich in organic matter, and slightly acidic. Ensure ample watering, especially in warm climates, and prevent the substrate from drying out completely, as it does not tolerate drought. It is crucial to protect it from harsh frosts in winter, or grow it as an annual in colder climates.
How to save a dying Cardinal flower
- Warning signs
- Yellowish/brown leaves, general wilting, soft stems. Indicates lack or excess of water or nutrients.
- First aid
- Check soil moisture. If dry, water deeply. If waterlogged, aerate roots and reduce watering. Fertilize if not done.
- What kills it
- Prolonged dryness or constant waterlogging. Needs constant moisture but good drainage.
- Can it be saved?
- Yes, if roots aren't completely rotted or dried out. Act quickly to adjust watering and nutrition.