The study was conducted in the Chikkamagaluru district of Karnataka state during 2019-20 to document the indigenous technical knowledge in plantation crops. 80 respondents from 2 taluks were constituted as a sample for the study. In the study, 30 Indigenous technical knowledge practices which were using in cultivating of plantation crops are documented. And also found their rationale behind practice of those documented ITKs in cultivation of plantation crops like arecanut, coffee, coconut etc. The ITKs were documented with help of pre-structured interview schedule and rationales behind practice of these ITKs were found with support of experts.