Reflective material is easily hung using staples tacks or tape. There are several ways growers make walls very reflective: White reflective paint. Flat white paint diffracts the light so that it is distributed more evenly through the garden. Off-whites absorb a considerable amount of light so they are avoided. The best paint for indoor gardens is greenhouse white which is formulated for maximum reflectivity. Aluminum foil is used to line the walls. It is highly reflective and very inexpensive. Its down sides are that it is noisy when it moves with a breeze and has little tensile strength, so that it tears easily when not attached to a surface. It is usually not used where it will be moved around or used for a curtain or doorway because it crinkles and tears easily. When the dull side out is used the reflection is defused rather than just reflecting hot spots. Eighteen inch wide heavy duty rolls are the easiest to work with. In places where heat must be conserved fiberglass insulation with aluminum reflective surface is often used to line the walls. Silvered gift wrap comes in rolls or sheets. it is composed of a thin metal foil glued onto paper wrap. It is very reflective, easy to use and inexpensive. It is available from some wholesale gift paper houses or from gift shops. Styrofoam is used in cool spaces where heat must be conserved. The walls can be lined with styrofoam insulating material which comes on a roll or in sheets. (available in some home improvement stores). It is extremely reflective. The rolls come in several widths, and is about 1/8" thick. Mylar. Grow stores sell silvered mylar which is extremely reflective. While mylar reflects most of the light; it is not opaque and it allows a dim image through. The plastic film creases easily. Astrolon is a silvered plastic which is extremely reflective, but not opaque. The thin plastic is quilted and very pliable It is very durable and very reflective. Successful closet cultivators know that light should be distributed evenly throughout the grow space. Light movers or several lights may be indicated. Smart growers line the walls of the growing area with a reflective surface to conserve light. Roots serve plants in several ways. They hold the plant in position and they are its primary means of obtaining water and nutrients. The size and efficiency of the root system has a great effect upon the development of the plant and ultimately, upon its yield. The amount of space that the roots have to grow depends on the cubic space of the container and the size of the particles in the growing medium. Roots growing around large sized particles obviously have less room than roots growing through small sized particles. The size of the container is determined by the final size that the gardener intends for the plants.
