If the leaves of the Calathea or Korbmarante, which is also non-toxic to cats, turn yellow, this is always an indication that you have fertilized the plant too well. How to prevent the Calathea from getting yellow leaves.
If the leaves of the calathea begin to turn yellow, action is required
Yellow leaves of calathea due to excess nutrients
The calathea has little nutritional requirements. You must therefore be careful when fertilizing, as the Korbmarante reacts to excessive fertilizer with yellow leaves.
If the leaves have turned yellow, you should repot the plant immediately. Place them in fresh substrate that must not be too nutritious.
In summer, the calathea is only fertilized every four weeks with liquid fertilizer in a concentration that is not too high. During the winter time she does not get any additional fertilizer.
tips
The calathea does not need a winter break like many other houseplants. The temperatures in winter must not be lower than 18 degrees. There is a little less watering in the dark season.