Selaginella Care Guide

Selaginella, often referred to as spike moss, is a low-growing, moisture-dependent plant that forms dense, carpet-like growth. Despite its common name, it is not a true moss, but its growth habit and environmental requirements are similar.

In nature, Selaginella grows in consistently damp, shaded environments with high humidity and stable conditions. Indoors, its success depends on replicating these conditions as closely as possible.

Light

Selaginella prefers low to moderate, indirect light.

It does not require bright conditions and can perform well in softer light than many indoor plants. Direct sun should be avoided, as it will dry and damage the foliage quickly.

Soft, indirect light → ideal
Bright indirect light → acceptable with adequate moisture
Direct sun → unsuitable

Water

Selaginella requires consistently moist soil at all times.

Unlike many indoor plants, it does not tolerate drying out. Even short periods of dryness can cause rapid decline.

Keep the growing medium evenly moist
Do not allow the plant to dry out
Avoid stagnant, waterlogged conditions

Once dried, recovery is often poor or incomplete.

Humidity

High humidity is essential for Selaginella.

In dry indoor air, the foliage quickly becomes crisp and declines. This is one of the most common causes of failure.

It performs best in:

Terrariums
Enclosed cabinets
Highly sheltered indoor environments

In open rooms, especially those with heating or cooling, it is difficult to maintain long-term health.

Temperature

Selaginella prefers stable, mild to warm temperatures.

Ideal range: 18–26°C
Avoid cold drafts and sudden fluctuations

Growing Medium

A moisture-retentive mix is required.

The medium should hold consistent moisture while still allowing some airflow around the roots. Fine, organic-rich mixes are suitable.

Growth Habit

Selaginella forms a dense, spreading mat.

It grows close to the surface, gradually expanding outward. This makes it well suited to:

Shallow containers
Terrariums
Groundcover in mixed plantings

Common Issues

Crisping or browning foliage

Usually caused by low humidity or drying conditions.

Rapid decline

Often the result of the plant drying out, even briefly.

Patchy dieback

Can occur when moisture levels are inconsistent.

Where Selaginella Works Best

Selaginella performs best in environments that maintain constant moisture and humidity.

Terrariums
Enclosed growing environments
Controlled indoor spaces

It is not well suited to open, dry indoor conditions.

Summary

Selaginella is not difficult, but it is highly sensitive to drying.

When kept consistently moist with high humidity and stable conditions, it grows reliably. When exposed to dry air or fluctuating moisture, it declines quickly and may not recover.