Giant salvinia (Salvinia auriculata)
Care, watering, light and tips for Giant salvinia on Floravia.
Quick facts
- Family: Salviniaceae
- Difficulty: Easy to care for
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
About Giant salvinia
Salvinia auriculata, also known as 'Water Fern' or 'Eared Salvinia', is a fast-growing, free-floating aquatic fern native to tropical and subtropical regions of the Americas. Its oval, hydrophobic-haired leaves form dense green mats on the water's surface, providing shelter for aquatic fauna and helping to control algae. It is ideal for freshwater aquariums, small ponds, and larger water bodies, where its presence adds a natural and dynamic touch.
Native range
Tropical and subtropical Americas, from the southern United States to Argentina.
Care tips
This plant thrives in bright to full light, though it can tolerate partial shade, which will slow its growth. It requires no substrate as it floats freely, absorbing nutrients directly from the water; occasional liquid fertilization can be beneficial in nutrient-poor water. It is crucial to avoid overpopulation, as its rapid growth can cover the entire water surface, hindering gas exchange and light for other plants. A common mistake is not controlling its expansion, which can turn it into a nuisance if not pruned regularly.
How to save a dying Giant salvinia
- Warning signs
- Rotting or browning leaves, stunted growth, lack of vibrant green color.
- First aid
- Remove dead leaves. Ensure clean, chlorine-free water. Check for bright indirect light and temperature (20-30°C).
- What kills it
- Contaminated water, lack of specific nutrients (nitrogen, potassium), or strong water flow submerging it.
- Can it be saved?
- Yes, it's resilient. With water, light, and nutrient adjustments, it usually recovers quickly.