Spider Ferns (Arachniodes simplicior) are delicate, finely textured ferns known for their soft, layered fronds and controlled growth habit. They are well suited to terrariums where a natural, woodland-style planting is desired, particularly in humid, enclosed environments. Browse current listings here:
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Spider Fern summary
Key characteristics: Fine-textured fronds, layered growth, woodland appearance Terrarium suitability: ★★★★☆ (4/5) Temperature: 16–24°C (60–75°F) Watering: Consistently moist Humidity: High Growth rate: Moderate Where to buy AmazonAmazon AU
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Spider Ferns are a strong choice for terrariums because they combine a natural fern look with relatively controlled growth. They bring a softer, more detailed texture than larger ferns while still responding well to humidity and stable conditions.
Terrarium suitability overview
- Closed terrariums: Very good fit
- Open terrariums: Moderate fit
- Small sealed jars: Suitable if space allows
- Large builds: Excellent mid-layer plant
Common names and plant type
- Botanical name: Arachniodes simplicior
- Common names: Spider Fern
- Plant type: Fine-textured tropical fern
Terrarium suitability
This fern performs well in terrariums because it prefers consistent moisture and high humidity. It maintains a relatively contained form compared to larger ferns, making it easier to integrate into a design without constant trimming.
It is particularly effective in natural-style terrariums where a layered, forest-floor look is desired.
Climate and environmental requirements
- Temperature: 16–24°C (60–75°F)
- Humidity: High
- Light: Bright indirect to moderate light
Cooler, stable temperatures suit this plant well. It often performs best in environments that are not excessively warm.
Water and substrate behaviour
- Prefers consistently moist substrate
- Does not tolerate drying out
- Requires good drainage to avoid root issues
Balance is important. While it needs moisture, stagnant conditions can still lead to decline.
Growth behaviour
- Clumping, layered growth
- Moderate expansion over time
- Maintains a soft, natural structure
This makes it easier to manage than more aggressive ferns, while still adding depth and detail.
Propagation
- Propagated through division
- Clumps can be separated carefully
Propagation is possible but should be done gently to avoid damaging the plant.
Pests and problems
- Browning from dry conditions
- Decline in low humidity
- Occasional pests in unstable environments
Most issues are related to environmental inconsistency rather than inherent difficulty.
Maintenance and control
Minimal pruning is required. Removing damaged fronds is usually enough to maintain appearance.
Its controlled growth makes it easier to manage than many fern species.
Where it works well
- Closed terrariums
- Woodland-style designs
- Mid-layer planting
Where it fails
- Dry environments
- Low humidity setups
- Very small containers with limited airflow
The main limitation is sensitivity to environmental change rather than growth behaviour.
Compatible plants
Compared to Lemon Button Fern, Spider Fern has finer, more detailed foliage. Compared to moss, it adds height and layering. Compared to Fittonia, it is less reactive but still requires stable humidity.
Lifespan in a terrarium
- Short-term: Excellent
- Long-term: Very good with stable humidity
With consistent moisture and humidity, Spider Ferns can remain healthy and attractive for extended periods.
Common issues
- Browning leaves from dryness
- Reduced density in low light
- Stress from fluctuating conditions
Most problems are preventable with stable care.
Where to buy Spider Fern
View on AmazonAmazon AU
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