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Many popular houseplants originate from tropical forest floors, where they receive filtered light rather than direct sun and grow in humid, consistently warm conditions. Transplanted into ordinary homes, these same species often struggle when placed on a sunny windowsill, since direct rays can scorch leaves accustomed to dappled shade. Overwatering is a more common cause of houseplant death than underwatering, since compacted potting soil retains moisture longer than gardeners expect, leading to root rot when water cannot drain away. Experienced growers generally recommend checking soil moisture with a finger before watering rather than following a fixed weekly schedule, since humidity, pot size, and season all affect how quickly soil dries out. Repotting into fresh soil every one to two years is also advised, both to refresh depleted nutrients and to give roots room to expand as the plant matures.