Answer: I am guessing that this is a houseplant--and what I think you are describing is a spathiphyllum, sometimes called a peace lily. These plants need to be kept evenly moist, but not too wet. They thrive in indirect light--they can get some direct sunlightbut should not be left in the bright sun all day. In fact, one of their best features is that they don't require lots of sun, and so are common office plants. Spathiphyllum will wilt dramatically if allowed to dry out. They will collapse to the floor and look dead. If this, by any chance, happens to you, just water the plant well, and in a few hours it will pick up again. Perhaps the reason your plant is "spreading" out is because it is a little on the dry side and is starting to wilt. Or maybe it is simply adapting to your home environment after growing in a warm, humid greenhouse.
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