Haze 100% Sativa is one of the most well known strains. Haze is considered difficult to grow and cultivate properly, but Haze benefits are well worth the effort. The patient must remain so, as the full effect may take slightly longer than other strains, but is rewarded with an experience well worth the wait. After winning awards at the 1997 Cannabis Cup, Haze truly sets the standard. Growing Haze Marijuana Has Medical Benefits.