Creativity depends on a number of things: experience, including knowledge and technical skills; talent; an ability to think in new ways; and the capacity to push through uncreative dry spells.
If you facilitate your subordinates' steady progress in meaningful work, make that progress salient to them, and treat them well, they will experience the emotions, motivations, and perceptions necessary for great performance.
Most people aren't anywhere near to realizing their creative potential, in part because they're laboring in environments that impede intrinsic motivation.