In many UK homes, damp areas and poor ventilation can contribute to mould growth, often resulting in allergies and other health issues. While most houseplants increase indoor humidity, making mould more likely, some specific plants actually help to prevent it. Many of these plants naturally absorb moisture from the air and, in certain cases, release antimicrobial and antifungal compounds to reduce mould formation indoors.
Houseplants reduce indoor mould through several mechanisms:
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Absorbing Excess Moisture: Certain plants act like natural dehumidifiers by taking in moisture from the air through their leaves, lowering humidity levels in the room and making it harder for mould to thrive.
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Releasing Compounds that Inhibit Mould: A few plants emit antimicrobial or antifungal substances that may prevent mould and mildew from developing on surfaces.
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Improving Air Circulation: Plants with larger leaves can improve air flow, which helps prevent moisture from settling and reduces the chances of mould forming.
Here are five houseplants known for their effectiveness in reducing mould indoors:
1. Peace Lily (Spathiphyllum)
- Why It Works: Peace lilies are excellent at taking in moisture from the air, making them ideal for humid spaces like bathrooms and kitchens. Their leaves also release natural compounds that can help keep mould at bay.
- Care Tips: Peace lilies thrive in moderate, indirect light and require weekly watering. Keep the soil lightly moist, but avoid waterlogging.
2. English Ivy (Hedera helix)
- Why It Works: Known for its air-purifying qualities, English ivy can also absorb airborne mould spores. Its spreading vines take in moisture and release oxygen, reducing the likelihood of mould forming.
- Care Tips: English ivy prefers bright, indirect light but can tolerate lower light levels. Keep the soil moist but ensure it is well-drained, and trim regularly to prevent it from taking over indoors.
3. Boston Fern (Nephrolepis exaltata)
- Why It Works: Boston ferns thrive in humid areas, such as bathrooms, where their fronds absorb moisture, purify the air, and reduce mould risk.
- Care Tips: Boston ferns need indirect light and high humidity, so misting the fronds regularly can be beneficial. Water frequently to keep the soil consistently moist, without over-saturating.
4. Snake Plant (Sansevieria trifasciata)
- Why It Works: Commonly known as mother-in-law’s tongue, snake plants release oxygen at night, making them perfect for bedrooms. They help absorb moisture and filter out airborne toxins, reducing mould spores.
- Care Tips: Snake plants are low-maintenance and can adapt to both low and bright indirect light. Let the soil dry between waterings, as they prefer drier conditions.
5. Aloe Vera
- Why It Works: Known for its medicinal uses, aloe vera is also effective at absorbing moisture and releasing antimicrobial compounds that help combat mould growth, especially in kitchens and bathrooms.
- Care Tips: Aloe vera needs bright, indirect sunlight and infrequent watering. Allow the soil to dry out completely between waterings, as it thrives in drier soil.
Tips for Maximising Mould-Reducing Benefits with Houseplants
- Place in High-Humidity Areas: Position these plants in damp-prone spaces like bathrooms, kitchens, or utility rooms, where they can help absorb moisture.
- Avoid Overwatering: Excessive moisture in the soil can create mould problems of its own, so make sure each plant has proper drainage and is watered appropriately.
- Wipe Down Leaves: Dust on leaves can hinder a plant’s ability to filter air effectively. Gently wipe the leaves with a damp cloth every few weeks to maximise their mould-reducing impact.
While these plants can help reduce moisture and discourage mould, they are not a complete solution. For persistent mould issues, seek professional treatment, ensure good ventilation, and use anti-fungal methods.
Incorporating these houseplants into your home can create a fresher, healthier indoor environment. Whether it’s a Peace Lily in the bathroom or a Snake Plant in the bedroom, these plants contribute to a cleaner, more breathable home while naturally helping to prevent mould buildup.
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