It's sometimes necessary to put a plant into intensive care or isolation until it's better. One of the best ways of doing that is to place the plant inside a plastic bag. Don't let the plant remain covered for too long though, or it will fail from lack of light and air. The most common cause of houseplant failure, especially in winter, is overwatering. Just about now, many of your houseplants may be showing damage from the drop in humidity levels as a result of turning on the heat in October.
Many people make the mistake of overwatering the soil to combat the dryness.
Prolonged overwatering causes root rot and the rapid decline of the entire plant. Keeping in mind that different varieties of plants require differing amounts of water in the soil, you should continue to water each plant as you did in the summer. Take steps to increase the humidity in the air instead of moisture in the soil. Keeping a close eye on your indoor garden on a weekly basis is a habit worth developing. That's where preventive maintenance begins.