Seaweeds are among the important renewable marine living resources with tremendous commercial application of the world. The effect of Seaweed Liquid Fertilizer (SLF) of Sargassum wightii was studied on the growth parameters of five different agricultural crops viz. Amaranthus roxburghinus, Amaranthus tricolor, Arachis hypogaea, Capsicum annum and Tagetes erecta . The seeds were soaked in different concentrations of SLF viz. 0.25%, 0.5%, 1.0% and 1.5% for 6h, 12h and 24h of durations. The maximum growth was recorded at 1% concentration Viz., shoot length, root length in cm and fresh weight in gram when compared to control. It was concluded that differential response was noticed in the crops to the seaweed extract treatment. In spite of these differential responses, Sargassum wightii was found to be an effective seaweed liquid fertilizer (SLF) in the crops.
