A field experiment was conducted during the rabi season of 2012-13 at Research-cum-Instructional Farm of I.G. Krishi Vishwavidyalaya, Raipur (Chhattisgarh) to study the response of seaweed saps on soil health and productivity of maize (sweet corn) in Inceptisols (Matasi) of Chhattisgarh. The foliar spray of two different species (Kappaphycus and Gracilaria) was applied thrice at different interval of crop with different concentrations (0, 2.5, 5.0, 7.5, 10.0 and 15% v/v) of seaweed extracts. Foliar applications of seaweed extract significantly enhanced the yield, nutrient uptake and soil fertility parameters. The highest green cob yield was recorded with applications of 15% Gracilaria sap + recommended dose of fertilizer (RDF), followed by 15% Kappaphycus sap + RDF extract resulting in an increase by 37.37% and 33.95% green cob yield, respectively compared to the control (water spray + RDF). The highest nutrient uptake nitrogen (N), phosphorus (P) and potassium (K) by green cob and fodder were observed under 15% G sap + RDF (T8). After harvest the maximum available N (229.97 kg ha-1) was observed under treatment 15% K sap + RDF (T4). The maximum available P (23.68 kg ha-1) and K (535.36 kg ha-1) was observed under treatment 5% G sap + RDF (T6).