Space media is probably not the type of media you are thinking about. In plant biology research we often refer to the gel agar on a petri dish as “media”. Seeds are sown directly on the gel surface. This surface is sticky, easily retains moisture and has sucrose and other nutrients in it. The consistency is similar to jello, maybe a little bit tougher. Space media is tougher than traditional media to resist acceleration of rocket launch.

Space Media Recipe