If you notice small white dots in your houseplant’s soil, there is usually no need to panic. In most cases, these dots are harmless and are simply perlite, a lightweight volcanic mineral commonly mixed into potting soil to improve aeration and drainage.
Perlite helps prevent soil compaction and allows roots to breathe, which is essential for healthy plant growth.
Occasionally, very small white dots may indicate mould or fungal growth, particularly if the soil is consistently wet or poorly drained. This is more likely if the dots are fuzzy, powdery, or spreading. This tends to be harmless for your houseplant.
To prevent fungal growth, allow the top layer of soil to dry out between waterings, ensure your pot has drainage holes, and provide good airflow around your plant.