Known to most as the happy plant, this Dracaena massangeana carries broad, glossy leaves with a wide lime-yellow stripe down the centre of each one. It's an old favourite for good reason, tolerating low light, air conditioning and irregular watering better than most indoor plants.Grow it in a bright room out of direct sun, in a free-draining potting mix, and let it dry out between waters. Over time it forms a sturdy cane with leaves clustered near the top.