Most of the establishment of community forests fail due to lack of understanding about the characteristics of farmers. Effort to conserve cempaka (Michelia champaca L.) could be done through development of cempaka private forest. This research aimed to study correlation between internal characteristics of farmers (knowledge, attitude and behavior) with growth performance of cempaka on a private forest demonstration plot. Cempaka private forest was established in two phases (2012 and 2013), involved 36 farmers. Data was collected by structured interview with farmers and measurement of cempaka growth. Data were analyzed using Pearson Correlation Test. The result showed that there was a significant correlation between internal characteristics of farmers with growth performance of cempaka. Positive correlation was shown between attitude and behavior with the successfull of cempaka growth. The strongest correlation was shown by behavioral characteristic, as high growth performance of cempaka was strongly influenced by farmer's activity in plant maintenance. Distinctive farmer characteristics require different approaches farmers empowerment. Training in cultivation technique and economical aspect of cempaka should be provided to farmer with characeristics: good knowledge, good attitude, fair behavior. In contrary, land optimalization and strengthening farmers' institution to anticipate larger timber market should be conducted to farmer with characteristics: poor knowledge, good attitude, good behavior. This results could be applied for farmer empowerment at Ginanjar Village in the future.