Java Fern Care Guide: Planting, Lighting & Propagation
Microsorum pteropus
Java Fern is an extremely hardy epiphyte that must be attached to wood or rocks. Learn how to grow, propagate, and avoid common beginner mistakes.
- Light
- Low to Moderate
- Growth Rate
- Slow
- Difficulty
- Easy
- Placement
- Midground
Overview
Java Fern is widely considered one of the easiest and most indestructible plants in the aquarium hobby. As an epiphyte, it absorbs nutrients directly from the water column rather than through the substrate, making it perfect for bare-bottom tanks or setups with basic gravel.
Care Guide
The most important rule for Java Fern is to never bury its rhizome (the thick green stem that roots and leaves grow from). Burying the rhizome will cause it to rot and die. Instead, use superglue gel (cyanoacrylate) or dark cotton thread to attach the rhizome directly to driftwood, rocks, or decorations. It thrives in low light; too much light will cause the leaves to turn brown or attract heavy algae growth.
Common Problems
Because Java Fern grows very slowly, it is highly susceptible to slow-growing algae like Black Beard Algae (BBA) and Green Spot Algae (GSA) if the lighting is too intense. Older leaves will naturally turn black or brown and die off over time; these should be snipped off at the base to encourage new growth.
Taxonomy
- Family
- Polypodiaceae
- Origin
- Southeast Asia
Growth
- Growth Rate
- Slow
- Emersed Capable
- Yes
- Rhizome Plant
- Yes
- Floating Plant
- No
Water Parameters
| Temperature | |
| Water pH |
Lighting
- Requirement
- Low to Moderate
- PAR Min
- 10 μmol/m²/s
- PAR Max
- 50 μmol/m²/s
Nutrition & Fertilization
- CO₂ Requirement
- Low
- Nitrate Demand
- Low
- Phosphate Demand
- Low
- Potassium Demand
- Low
Algae Sensitivity
- Black Beard Algae
- High
- Green Spot Algae
- High
- Diatoms
- Moderate