In many Australian homes, damp, enclosed spaces can lead to mould growth, which often triggers allergies and other health issues. While houseplants generally increase humidity, creating an environment where mould might thrive, some specific plants actually combat the formation of indoor mould naturally. These typically tropical native plants not only add greenery to your space but also act as natural dehumidifiers, absorbing ambient moisture, and in some rare instances, releasing antimicrobial and antifungal compounds that can naturally inhibit mould growth.

Houseplants Fight the Formation of Mould in Several Ways:

1. Absorbing Excess Moisture: Certain plants take up moisture from the air through their leaves, effectively acting as natural dehumidifiers. This lowers the humidity level in your home, making it less hospitable for mould spores to thrive.

2. Releasing Compounds that Combat Mould: While rare, some plants release antimicrobial or antifungal compounds into the air. These substances inhibit the growth of mould and mildew on surfaces.

3. Improving Air Circulation: Plants with broad leaves help to circulate air within a room, preventing moisture from settling and creating a mould-friendly environment.

Here Are Five Houseplants Known for Their Ability to Reduce Mould Effectively:

1. Peace Lily (Spathiphyllum)

Why It Works: Peace lilies are excellent at absorbing moisture from the air, making them effective in rooms with high humidity levels, such as bathrooms and kitchens. Their glossy leaves release natural compounds that can limit mould growth.

Care Tips: Peace lilies thrive in moderate, indirect light and require only weekly watering. Keep the soil slightly moist but avoid waterlogging, as they prefer humid conditions without excessive water around the roots.

2. English Ivy (Hedera helix)

Why It Works: English ivy is a powerful air purifier that can also absorb airborne mould spores. Its trailing vines spread across surfaces, absorbing moisture and releasing oxygen, which can inhibit mould growth.

Care Tips: English ivy does well in bright, indirect light but can tolerate lower light levels. It likes moist, well-drained soil, so water when the top layer feels dry. Trim it regularly to prevent it from becoming too invasive indoors.

3. Boston Fern (Nephrolepis exaltata)

Why It Works: Many ferns have humidity-absorbing capabilities, but the Boston fern in particular thrives in bathrooms and other humid areas. Its feathery fronds absorb moisture, and it releases oxygen, helping to purify the air and discourage mould formation.

Care Tips: Boston ferns prefer indirect light and require high humidity, so misting the leaves regularly can be helpful. Water frequently to keep the soil consistently moist but avoid waterlogging the roots.

4. Snake Plant (Sansevieria trifasciata)

Why It Works: Snake plants, also known as mother-in-law’s tongue, release oxygen at night, making them great for bedrooms. They absorb moisture and filter out toxins from the air, which may help reduce mould spores indoors.

Care Tips: Snake plants are low-maintenance and tolerate low to bright indirect light. Water them sparingly, as they are drought-tolerant and prefer dry soil between waterings.

5. Aloe Vera

Why It Works: Aloe vera is not only a well-known medicinal plant but also effective at absorbing moisture and releasing antimicrobial compounds that inhibit mould growth. It’s an ideal choice for kitchens and bathrooms.

Care Tips: Aloe vera needs bright, indirect sunlight and only occasional watering. Allow the soil to dry out completely between waterings, as it prefers drier conditions.

Tips for Maximising Mould-Reducing Benefits with Houseplants

• Place in Humid Areas: Position these plants in areas prone to dampness, such as bathrooms, kitchens, or laundry rooms, to help reduce moisture.
• Avoid Overwatering: Excess water in plant soil can create its own mould problems. Make sure each plant is in a well-draining pot and that you’re watering appropriately for each plant type.
• Wipe Down Leaves: Dust can block a plant’s ability to filter air, so gently wipe the leaves with a damp cloth every couple of weeks.

It is important to note that houseplants will not eradicate existing mould and fungal spores. It is best to seek professional assistance, implement anti-fungal solutions, and always ensure there is proper ventilation in the space.

Having said this, incorporating these houseplants into your home is scientifically proven to create a fresher, healthier indoor environment. Whether you add a Peace Lily to your bathroom or place a Snake Plant in your bedroom, these plants contribute to a cleaner, more breathable space while absorbing excess moisture from the air, helping to fight the formation of mould.