Sproutly Plant Care Team
Practical indoor-plant guidance for home growers. Pages are reviewed when updated and focus on clear diagnosis, safer care habits, and realistic household conditions.
Plant Glossary
What Is Perlite?
Last Updated: June 2026 - Soil & Potting
Definition
Perlite is a lightweight expanded volcanic glass added to potting mixes to improve drainage and airflow.
Quick Facts
| Plant term | Perlite |
| Category | Soil & Potting |
| Common example | Succulent mixes often include perlite or pumice for faster drainage. |
| Care takeaway | Add perlite to dense potting mix to make it drain faster. |
Why It Matters
Perlite creates air pockets in potting mix, helping roots access oxygen and reducing the chance that soil stays soggy. It is especially useful for plants that hate wet roots.
How to Identify It
- ->Perlite is the lightweight white speckled material in many potting mixes.
- ->It crushes more easily than pumice and often floats when a mix is watered.
- ->Its job is structure and air, not feeding the plant.
Care Notes
- ->Add perlite to dense potting mix to make it drain faster.
- ->Use more perlite for succulents, cacti, hoyas, and plants prone to root rot.
- ->Rinse or moisten perlite gently if dust is irritating while mixing.
Examples
Succulent mixes often include perlite or pumice for faster drainage.
Aroid mixes may combine potting soil, bark, and perlite.
Propagation mixes often use perlite for moisture plus airflow.
Perlite vs. Pumice vs. LECA
Perlite is usually a potting mix ingredient, while LECA is more often a standalone semi-hydro medium.
| Material | Weight | Best Use |
|---|---|---|
| Perlite | Very light | Adding air and drainage to soil mixes |
| Pumice | Heavier mineral | Long-lasting grit for succulent and aroid mixes |
| LECA | Light clay balls | Semi-hydro setups and reservoir growing |
Related Glossary Terms
Related Guides
Frequently Asked Questions
No. Perlite mainly improves structure, drainage, and aeration. It does not feed the plant.
Yes. Too much perlite can make a mix dry too fast for moisture-loving plants. Match the amount to the plant.
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