Give some reasons why the use of khadi could not spread among some classes castes and regions of India?

khadi was costly and not everyone could fered to spun it at their homes.. those who could fered of it . wished to wear khadi clothes....

castes rules and regulation.

hindu caste and rule and regulation were vry strict at these time and their were vry considered wearing khadi as destinte gration of their caste suphericerily..