An indoor grow room can provide a home with year-round access to seasonal plants, orchids and culinary herbs. The plants in a grow room also help to improve indoor air quality by increasing the humidity and oxygen levels while reducing indoor air pollutants, according to the University of Hawaii College of Tropical Agriculture and Human Resources. Setting up an indoor grow room will require some planning to ensure that the plants have an ideal temperature and adequate lighting and space.
Choose a room. An ideal room for growing plants has an east facing window and moderate humidity levels. Eastern rooms also have cooler and more stable temperatures than other rooms, according to the University of Georgia Cooperative Extension.
Determine the number of plants you wish to grow in the available space. Most plants will need to be re-potted as they grow. At the minimum, plan on providing a 6- by 6-inch area for each plant that you wish to grow.
Provide surfaces for the plants. You may be planning to use spare desks and tables, but make sure they are sturdy and can support artificial lighting fixtures, if needed. If you are relying on sunlight for your plants, arrange the tables next to the window.
Use rectangular trays under plants to guard surfaces. Plastic plant trays are easy to find at garden centers and makes watering easier by collecting the excess water that drains out of the plants.
Research the light requirements for the plants. Some plants must have full sun to flourish, where others grow well with minimal light. If the room is north facing or has inadequate light, you will need to supplement with artificial lights.
Use fluorescent lighting for plants with lower light requirements. Fluorescent lights have a lower light intensity but use less electricity and are cooler in temperature compared to incandescent bulbs, according to the University of Hawaii. Fluorescent light fixtures come in 2- or 4-foot lengths in a variety of fixture styles.
Choose incandescent grow bulbs for plants with higher light requirements. Plants using incandescent bulbs as a light source may dry out quickly due to the heat produced by the bulbs.
Monitor humidity levels. The optimum humidity level for most plants is between 40 and 50 percent, according to the University of Georgia. Group plants close together to increase the humidity directly around the plants or use a humidifier to increase the entire room's humidity level.