Seaweed Liquid Extracts (SLE) are the organic fertilizers widely used for improvement of the growth and productivity in plants. Five seaweed species were handpicked from the coastal areas of Visakhapatnam. They were thoroughly washed and prepared to make seaweed liquid extracts of different concentrations. Out of interest, seeds of six plants i.e. Wheat (Triticum aestivum), Rice (Oryza sativa), Black gram (Vigna mungo), Green gram (Vigna radiata), Bengal gram (Cicer arietinum), Watermelon (Citrullus lanatus) were selected and treated with the SLE of five seaweed species i.e. Ulva intestinalia, Ulva lactuca, Gracilaria edulis, Audouinella.sp.(black beard algae), Jania rubens(slender-beaded coral weed) and checked for various morphological and growth parameters. The data were analyzed and tabulated statistically using mean ± standard deviation and the comparisons were evaluated by ANOVA. All measurements were made in triplicate. By this study we conclude that, the seeds soaked in 20% seaweed liquid extracts showed better results in germination and growth, than the controls. Liquid extract of Ulva lactuca was reported to show more effect on seed germination, and on a whole among the five seaweed extracts, Ulva intestinalia, Ulva lactuca, Gracilaria edulis showed better effects, than Jania rubens, Audouinella.sp.