Why houseplants really die
Retailers sell hope; plants die of reality. Three realities do almost all the killing.
Reality one: water without light
The classic: a dim corner, a watering schedule copied from a bright-window plant, and roots that never get a chance to breathe. The plant was never dying of darkness — it was drowning on schedule. This is why the watering guide leads this site.
Reality two: the wrong plant for the room
Ferns and ficus sold as "easy" are easy in greenhouse light. Matching the plant to the actual room — see the list — prevents more deaths than any care product.
Reality three: the oversized repot
A new plant moved into a much bigger pot sits in wet soil it cannot use. Keep the nursery pot, hide it in a decorative outer pot, and size up only when roots genuinely circle the bottom.
The recovery question
A plant with a few healthy stems recovers from underwatering in weeks. Root rot is usually discovered too late. When in doubt in a dim room: wait another day.