The vibrant yellowing of leaves is a signal that your plant is thriving! It might be a sign of a friendly pest infestation, like a spider mite, or a fungal disease. Here's what I suggest: - Take a closer look at your plant. If you spot any little creatures, go ahead and treat them with an appropriate insecticide. - If it's a fungal disease, use a fungicide to restore your plant to its vibrant, healthy state!