Mermaid Weed
Proserpinaca palustris
Mermaid Weed
About this plant
Proserpinaca palustris, commonly called Mermaid Weed, is a water-loving plant found in marshes and shallow waters. It has slender, branched stems with narrow leaves that can look feathery underwater. This plant helps provide habitat for aquatic life and can be used in water gardens or natural ponds.
Taxonomy
- Genus
- Proserpinaca
- Family
- Haloragaceae
- Higher classification
- Order Saxifragales
- Plant type
- Perennial
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Eastern North America, Central America
- Distribution
- Native to eastern North America, including the United States and Canada, and parts of Central America.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Greenhouse
- Preferred window facing
- South-facing, East-facing, West-facing
- Watering frequency
- Frequent
- Humidity
- High
- Minimum
- -15 °C
- Maximum
- 30 °C
- Optimal
- 15-25 °C
- USDA hardiness zones
- 5-10
- Soil pH
- 5.5-7.0
- Soil type
- wet, organic-rich soil or submerged substrate
Watering. Keep soil constantly wet or submerged in water. Do not allow the plant to dry out.
Fertilizing. Fertilize sparingly with a balanced aquatic plant fertilizer during the growing season to support healthy growth. Avoid over-fertilizing to prevent algae growth.
Proserpinaca palustris is an aquatic or semi-aquatic plant that grows in wetlands and shallow water. It prefers sunny to partly sunny spots and needs consistently moist or submerged soil. It can be sensitive to drying out but is otherwise low-maintenance once established.
Propagation
- Propagation methods
- Seeds, Division
- Care difficulty
- Medium
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Delicate, feathery foliage and small greenish flowers in summer. Attractive underwater form in ponds or aquariums.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Low spread
Non-toxic and safe around children and pets.
Allergy information
- Allergy risk
- None
- Allergy triggers
- Unknown
- Pollen level
- None
Proserpinaca palustris is not known to cause allergies. People sensitive to plant pollen generally do not react to this species. It is safe to handle and does not produce irritating sap or strong fragrances.
Common problems
If the soil dries out or water levels drop, the plant may wilt or die back. Poor light can cause weak growth. Occasionally, algae or pests may affect it in aquatic settings.
Uses
Used in natural pond landscaping, water gardens, and habitat restoration projects. Provides shelter for aquatic animals and helps improve water quality.
Notes
This plant thrives in aquatic or very moist environments and may need to be submerged or kept in saturated soil. It can be propagated by seed or division. Avoid letting it dry out completely.