The fern will become thicker and stop losing leaves. Prepare its special conditioner.

Why does the fern wither and lose its leaves? Growing conditions
To ensure healthy growth of your ferns, it is crucial to provide them with a well-drained, humus-rich substrate with a pH of 5 to 6. Place them in places with diffused light and make sure to water them properly (preferably twice a week) to keep soil and air humidity high, but avoid overwatering which can cause yellowing of the leaves.

Homemade Fertilizer for Ferns – Recipe and Application
An excellent homemade fertilizer for your ferns is black tea. Here is the recipe:

1. Boil filtered water and let it cool slightly (around 80°C).
2. Place black tea bags in a cup or glass and pour the hot water over them.
3. Let the tea sit until it cools.
4. Dilute the black tea with boiled and cooled water.
5. Water your ferns with this solution whenever they need nourishment, about once a week.
   

Black tea is a natural source of nutrients such as flavonoids and tannins, which help plant development without the risk of damaging the roots. This homemade fertilizer will strengthen your ferns and promote thicker, healthier leaves.

I hope you find these tips useful in keeping your ferns in top condition!