has anyone grew cinderella

Just wondering if anyone has grew cinderella and has any tips or info on growing this strain. Im 3 weeks into flowering and things are looking ok apart from slight n defeciency(yellowing fan leaves)im using big bud which always seem to have this effect as it has no nitrogen in it, also it does not have many leaves compared to other strains i have grown before just wondering if this is normal? buds are looking healthy but plant looks awful bare as there is not many leaves.