The aim of this research is to study the effect of NPK fertilizer concentration on composite based Cellulose Gluconated NPK hydrogel characteristics. The raw material used in this study was corn cobs cellulose and Gluconic acid. The experiment was conducted in a completely randomized design with three replicates of different doses of fertilizer (0, 5, 10 and 15%). The parameters monitored were swelling rate, moisture content, nitrogen content, potassium content, phosphorus content, texture and surface morphology. Enriched Cellulose Gluconated NPK hydrogel were used as soil conditioners and fertilizers for agricultural crops. The results of analysis of variance (ANOVA) showed that different types of fertilizers dose had a significant effect (PH<0.05) on their physicochemical properties. The higher the number of fertilizers, the less swelling will occur.