Pineapple “Ananas Comosusâ€The Pineapple plant is part of the Bromeliad family, which mainly thrive in the tropical Americas. When the pineapple plant matures, it will send up a flower spike, except that instead of a flowering bract, it will grow a pineapple fruit on top of a stiff spine. Pineapples are not hard to grow. A successfully rooted pineapple plant will start to grow within weeks, provided it gets plenty of warmth and adequate moisture.. If you're looking for a fun gardening project (with a sweet payoff!) this might just be it. The plants are attractive, too, with a rosette of spiky, exotic-looking leaves and an interesting flower spike. Although like many house plants, the pineapple is a good air purifier.