Objective:To investigate the effect ofSeaweedLiquidFertilizer(SLF) of the red seaweedHypnea musciformis(Wulfen)Lamouroux(H. musciformis). on the growth, biochemical and pigment characteristics ofArachis hypogea(A. hypogea).Methods:Experiments were conducted on ground nut to study the potential red alga ofH. musciformis as a biofertilizer.The seeds were sown in soil andSLF were added to soil bed in five different concentrations separately(1%,2%, 4%,6% and8% w/v).Results:The2% concentration of water extract showed better results of growth parameters, biochemical and pigments constitutions.Among the different concentrations ofSLF investigated, the plants that received with2%SLF showed maximum germination percentage, fresh weight, dry weight, root and shoot length, number of branches, leaf area, root nodules and content of total chlorophyll, chlorophyll a and b, protein, carbohydrate and lipid were observed at2% concentration ofSLF.The leaf of2%SLF treated A. hypogea has subjected toScanningElectronMicroscopy withEnergyDispersive spectroscopic analysis, it revealed that the presence of ten elements in the following order:Ca>P>N>Na>K>Mg>Mn>S>Fe>Zn in treated andCa>N>P>Na>Mg>Mn>K>Zn>S>Fe in control plant.The data generated from study reveal that SLF ofH. musciformiscould be used as foliar spray at low concentration of2% to maximize the growth and yield of A. hypogeaand also increase the number of stomata in the leaf.Conclusion:It is suggested that there are considerable gains to be made in increasing yield and stabilizing the yield in environments characterized by terminal requirement for organic and by shortening crop duration nutrient management appear promising.