If you see that your spider plant has brown leaves, you may be overwatering or under watering your plant. Make sure not to let the roots soak in too much water but don’t allow the soil to dry out. During winter, indoor heating systems may create a dry atmosphere and take away the humidity they need. It’s best to move your plants away from heat sources and run a humidifier to help your plants cope. You can also place your plants in the bathroom or other humid areas of the house.