The yellow leaves may be caused by sunburn. At this time, use scissors to cut off the leaves that have turned yellow in large area, and then put them in a half shade for curing. Maybe it's because it's flooded. At this time, take it out of the soil, cut off rotten roots and yellow leaves, and then plant it into a new soil that is not easy to accumulate water for maintenance. It may also be because it lacks nutrition. At this time, we should add some fertilizer for it to supplement nutrients.
