This problem is the most common cause of yellowing cannabis leaves. This can happen both due to excessive watering of the plant and due to insufficient.
1. Excessive Watering. If the plant receives too much water, the latter will not allow oxygen to the roots. Excessive watering will make your marijuana leaves look full and swollen. The reason may also be a poor drainage system, if for example there are no drain holes in the pot, which remove excess water, or they are not enough. It is also possible if a small cannabis plant is planted in a large pot, which causes it to receive too much moisture. To prevent this from happening, or to correct this problem, you need to change your watering system, such as watering less or less water. The main thing is not to allow cannabis to turn completely yellow, so you need to take care of your plants.
2. Underwatering. The symptom of underwatering is that the leaves look thin and slack. Too many cannabis plants may grow in the pot, so they do not get enough water each. It is also possible if you left and missed the watering day. In such cases, you need to adjust the amount of water that cannabis receives each time so that it was enough for normal plant life.