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Hi all,
I have noticed some yellow substance on the soil of my Parlour Palm. Googled it and it said that was some sort of fungus. Is it true? Does it do harm on the plants? How to get rid of this if yes?
Have been placing both of these plants indoors and cover the top soil with pine bark?
TIA
Hello @CarlL
Yes, what you are seeing on the soil surface does appear to be a type of fungal growth. It is quite common on indoor plants like your Parlour Palm, especially when the top layer of soil stays damp and air circulation is limited. The yellowish or whitish fuzzy or powdery layer is usually saprophytic fungus. These fungi feed on decaying organic matter in the soil rather than the living plant itself, so they are generally not directly harmful to your palm. However, they do indicate that the soil environment is too moist and poorly aerated, which can eventually lead to root rot if left unchecked.
The most effective way to deal with this issue is first to remove the affected top layer of soil carefully using a spoon or small trowel. Discard it rather than mixing it back into other potting soil. Replace it with fresh, dry, sterile potting mix. Allow the soil to dry slightly between waterings, as overwatering is the main cause of fungal growth. Ensure the pot has proper drainage holes and that no excess water collects in the saucer.
Improving air circulation around the plant also helps prevent fungal spores from thriving. If you use pine bark as a mulch on top, make sure it does not stay too wet, as that can trap moisture and worsen fungal activity. It is fine to use bark for decorative purposes, but only once the fungus is gone and you are sure watering habits are balanced.
If the fungus keeps returning, you can lightly dust the soil surface with a small amount of ground cinnamon, which acts as a mild natural antifungal. Avoid chemical fungicides indoors unless the problem becomes severe, as they are rarely necessary for this type of fungus.
If you need further assistance, please let us know.
Eric
