This research aimed to improve the early childrens naturalistic intelligence through hydroponic planting activity on children at the age of 5-6 years old in TK Pertiwi 2 Petahunan, Pekuncen Sub-district, Banyumas Regency. The naturalistic intelligence on early children can be improved through a right habituation or stimulation from teachers or parents. This classroom action research involved 9 students of Group B in TK Pertiwi 2 Petahunanas the subjects which consisting of 2 male and 7 females. The data were collected using observation and documentation of photos with descriptive qualitative analysis to analyze the data. The independent variable of this research was hydroponic technique and the dependent variable was naturalistic intelligence. The findings revealed that early children's naturalistic intelligence might be improved after two cycles of three meetings each. The action that was given was hydroponic planting. The results also showed that at first, there were 2 children with naturalistic intelligence developing as expected, then it improved after an action was done in cycle I to 3 children with naturalistic intelligence developing as expected and 2 children with naturalistic intelligence developing very well. The other improvement was also seen after the action was done again in cycle II. There were 5 children with naturalistic intelligence developing as expected and 3 children with naturalistic intelligence developing very well. Therefore, it can be concluded that the early childrens naturalistic intelligence can be improved through hydroponic planting activity.