(Image credit: Shutterstock) Snake plants are supposed to be indestructible. They tolerate neglect, survive low light, and go weeks without water. So when yours starts leaning, flopping over, or completely collapsing despite looking otherwise healthy, it's worrying. Falling leaves aren't cosmetic. They signal the plant is structurally compromised at the base, either from roots that can't anchor properly or stems that have gone soft. The plant can't physically hold itself up anymore. 1. Check for root rot from overwatering Overwatering is the most common reason snake plants fall over. Too much moisture causes root rot, which destroys the root system and makes the base of the plant mushy. Without healthy roots anchoring it and firm tissue at the base supporting leaves, the plant can't stay upright. Snake plants store water in their thick leaves and roots like other succulents. They're adapted to drought and need infrequent watering.…