I've only killed houseplants one of two ways - overwatering or not watering enough. If the plant looks wilted but green, you overwatered. If they're dry, you didn't water enough.
The most common causes are straightforward: overwatering, underwatering, root-bound plant that needs repotting. Tropical plants require humidity. Your plants should not be too close to a heat source.
First of all I want to remind you one thing and that is all the plants need a child like care from you maam. If it is a big plant or its a small you will have to concentrate with its watering and manure. you have to water it properly. Sometimes it may happen because of excess water. thanks
The most common cause of a house plant dying is too much or too little water. Many people over water, which results in root rot. Excess fertilizer can also kill plants.