Water Sprite
Ceratopteris thalictroides
Ceratopteris thalictroides
About this plant
Ceratopteris thalictroides, commonly called Water Sprite, is a fast-growing aquatic fern with delicate, lacy green leaves. It is often used in aquariums and water gardens for decoration and oxygenation. This plant floats or grows submerged and can help improve water quality. It is popular for its attractive, feathery foliage and ease of care.
Taxonomy
- Genus
- Ceratopteris
- Family
- Pteridaceae
- Higher classification
- Polypodiopsida (ferns)
- Plant type
- Perennial
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Tropical Asia, Africa, Americas
- Distribution
- Native to tropical and subtropical regions worldwide, including Asia, Africa, and the Americas. Widely cultivated in aquariums and water gardens globally.
Care
- Light preference
- Partial shade
- Suitable locations
- Indoor, Outdoor, Greenhouse, Balcony
- Preferred window facing
- East-facing, North-facing, Northeast-facing, Northwest-facing
- Watering frequency
- Frequent
- Humidity
- High
- Minimum
- 10 °C
- Maximum
- 30 °C
- Optimal
- 20-28 °C
- USDA hardiness zones
- 10-12
- Soil pH
- 6.0-7.5
- Soil type
- aquatic substrate, or nutrient-rich water
Watering. Keep the plant submerged in water or in very moist conditions at all times. Change water regularly to maintain cleanliness and prevent algae.
Fertilizing. Fertilize sparingly with a diluted aquatic plant fertilizer every 4-6 weeks during the growing season. Avoid over-fertilizing to prevent algae growth.
This aquatic fern is easy to care for and thrives in water or very moist soil. It prefers warm temperatures and indirect light. Keep it submerged or in a very humid environment to prevent drying out. It rarely has problems if basic water and light needs are met.
Propagation
- Propagation methods
- Cuttings, Division
- Care difficulty
- Easy
Ornamental features
- Flowering
- No
Lacy, bright green, feathery foliage that floats or grows submerged in water, creating a delicate and attractive appearance.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Low spread
Non-toxic to humans and pets, safe to keep around children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Unknown
- Pollen level
- None
Ceratopteris thalictroides is generally safe and unlikely to cause allergies. People sensitive to plant spores might experience mild irritation, but this is rare. To reduce any risk, avoid handling the plant if you have known fern or spore allergies.
Common problems
If kept out of water or in dry conditions, the leaves may wilt or turn brown. Poor water quality can lead to algae growth or slow growth. Too much direct sunlight can cause leaf burn.
Uses
Used as an ornamental aquatic plant in aquariums and water gardens. It helps oxygenate water and provides shelter for aquatic life.
Notes
This plant grows best fully submerged or floating in water. It can be trimmed to control size. Repotting is not needed as it grows in water. Sensitive to cold temperatures below 10°C (50°F).