Abstract: The composition and chemistry of ash and potash from various plant materials were assessed. Sequel to unavailability of vital information on the composition and chemistry of ash and potash is the production of potash of low quality, especially by local producers, as well as wrong determination or identification and quantification of components of potash in studying it for various purposes. In this review, both qualitative and quantitative chemistry of ash and potash as well as factors affecting them were evaluated; disparities in observations in previous studies were identified and clarified. The results indicated variable compositions, definite chemistry influenced by several factors and different ideas and observations of various researchers.