Pest identification
What's eating my water clover fern?
Aphids
Signs: Soft clusters on emergent fronds and new growth above the water; fronds curl and growth distorts.
Control: Knock off with a strong jet of water or dip emergent foliage in dilute insecticidal soap solution; avoid introducing soap into a fish-inhabited aquarium.
Spider mites
Signs: Pale stippling and drying of fronds exposed to warm, dry air above the water surface.
Control: Increase ambient humidity around the container and mist exposed foliage; apply neem oil only to emergent parts, keeping it out of the water.
Snails
Signs: Ragged holes or complete removal of floating leaflets, particularly in outdoor pond or patio settings.
Control: Hand-pick snails at dusk; introduce natural pond predators where appropriate; avoid chemical molluscicides near water with aquatic life.
Keep water clover fern pest-free
Healthy plants resist pests best. Get the basics right:
Water Clover Fern pests — FAQ
What is eating my water clover fern?
Water Clover Fern (Marsilea mutica) is an aquatic fern kept in containers or shallow water. Spider mites attack if fronds are allowed to dry out. Aphids can colonise emergent foliage. Snails and pond ramshorn snails occasionally graze the floating fronds. Consistent water coverage is the best pest deterrent.
How do I get rid of aphids on water clover fern?
Soft clusters on emergent fronds and new growth above the water; fronds curl and growth distorts. Knock off with a strong jet of water or dip emergent foliage in dilute insecticidal soap solution; avoid introducing soap into a fish-inhabited aquarium.
How do I get rid of spider mites on water clover fern?
Pale stippling and drying of fronds exposed to warm, dry air above the water surface. Increase ambient humidity around the container and mist exposed foliage; apply neem oil only to emergent parts, keeping it out of the water.
How do I get rid of snails on water clover fern?
Ragged holes or complete removal of floating leaflets, particularly in outdoor pond or patio settings. Hand-pick snails at dusk; introduce natural pond predators where appropriate; avoid chemical molluscicides near water with aquatic life.