Mold on potting soil is a common problem, especially with houseplants. Although the mold is usually not harmful to the plant itself, it often indicates unfavorable growing conditions.
Causes of mold
- Waterlogging : Overwatering or poor drainage promotes mold growth.
- Poor ventilation: A location with little air circulation promotes the development of mold spores.
- Nutrient-rich soil: Organic material in the soil can promote mold growth, especially if it remains moist.
Recognizing mold
Typical signs include:
- Whitish or greyish coating on the earth's surface.
- Partly a musty smell.
- In severe cases, visible fungal growth.
Remove mold
- Remove the top layer of soil and dispose of it.
- Loosen the remaining soil to improve air circulation.
- Treat the soil with home remedies such as cinnamon (antifungal effect) or a biological fungicide.
Preventive measures
- Ensure good drainage in the pot.
- Water only when the top layer of soil is dry.
- Place the plant in a bright, well-ventilated location.
