Sagebrush is just one component of a sage grouse's needs, but a critical one. In winter, they subsist entirely on sagebrush leaves and the tall shrubs are also important for hiding sage grouse nests. Planting sagebrush is a viable option in habitats lacking sagebrush plants or seeds for natural regeneration. Success establishing sagebrush varies greatly and depends on many factors including soil type, nutrients, precipitation, and existing vegetation along with ensuring the seed mixture or seedlings selected are appropriate for the ecological site you are restoring.
For best results, you should consult with your local NRCS office to obtain specific recommendations and specifications for your project.
For a thorough discussion and restoration guidelines, download this 2011 paper by David A. Pyke, published in Studies in Avian Biology (3/1/11): Restoring and Rehabilitating Sagebrush Habitats