Nakia Maples, better known as Philly Plant Guy, has around 200 plants in his South Philly rowhouse. They're mostly tropicals like palms, philodendrons and long, trailing pothos in hanging baskets. In his “plant room”—where the only unoccupied space is a small sofa—a fountain gurgles away, and humidity-loving ferns hang above. A turtle swims in a
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