The Madagascar dragon tree, also known as the red-margined Dracaena, is a popular indoor plant that likes low-to-medium light and tolerates irregular watering. When watering houseplants, be sure to soak the root ball thoroughly. Remember to let the top soil dry out in between watering (press two knuckles into the pot to test). One of the biggest pitfalls in taking care of houseplants is over-watering them. If it's been a cloudy week, the plant may still be moist from its last drink.