Updated: July 12, 2022

Fern plants are popular houseplants because of their beauty and ability to purify the air. However, brown spots on fern leaves can be a cause for concern for plant owners. If you’re wondering why your fern plant has brown spots, keep reading to find out.

Lack of Watering

One of the most common reasons for brown spots on fern leaves is a lack of watering. Ferns require moist soil, and if the soil dries out, the leaves will turn brown and wilt. You should water your fern plant regularly, and make sure the soil is always moist but not waterlogged.

Overwatering

While lack of watering can cause brown spots, overwatering can also contribute to the problem. Overwatering can cause root rot, which can make it difficult for the plant to absorb nutrients properly. This can result in brown spots on the leaves. Make sure you don’t water your fern plant too often and that the soil has proper drainage.

Low Humidity

Fern plants thrive in high humidity environments. If you live in a dry climate or have low humidity in your home, your fern plant may develop brown spots. You can increase humidity by misting your plant regularly or placing a tray of water near the plant.

Inadequate Light

Fern plants prefer indirect sunlight, but they still need sufficient light to thrive. If your fern plant is not getting enough light, it may develop brown spots on its leaves. Consider moving your plant to a brighter location or providing additional light with artificial lighting.

Pests

Pests such as spider mites and mealybugs can also cause brown spots on fern leaves. These pests are typically found on the undersides of leaves and can be difficult to detect. If you suspect that pests are causing the problem, inspect your plant closely and treat it with an appropriate insecticide.

Fungal Infection

Fern plants are susceptible to fungal infections, which can cause brown spots on the leaves. These infections can be caused by overwatering, poor air circulation, or high humidity. If you suspect that your fern plant has a fungal infection, remove any affected leaves and treat the plant with a fungicide.

In summary, brown spots on fern leaves can be caused by a variety of factors, including lack of watering, overwatering, low humidity, inadequate light, pests, and fungal infections. By identifying the cause of the problem and taking appropriate action, you can help your fern plant recover and thrive.

FAQs

Can I save my fern plant if it has brown spots on its leaves?

Yes. If you identify the cause of the problem and take appropriate action, your fern plant can recover. However, it may take some time for the plant to fully recover.

How often should I water my fern plant?

Fern plants require moist soil but not waterlogged soil. You should water your fern plant when the top inch of soil feels dry to the touch.

Can I mist my fern plant to increase humidity?

Yes. Misting your fern plant regularly can help increase humidity and prevent brown spots on the leaves.