This study was done at Antoniades Research Branch, Horticulture Research Institute, A.R.C. Alexandria, Egypt during the two successive seasons of 2018 and 2019 to study the effects of yeast vinasse “Nutripotasse" as organic liquid fertilizer and best time for its addition along the growth period under application of compost as organic manure on the vegetative growth, root characteristics and chemical analysis of Paspalum vaginatum plant, Sods of Paspalum turf-grass were planted in a plastic box (40 x 30 x15 cm) filled with sandy soil , the compost treatments were (0 and 150 g/ planting box). It was added to the surface of the soil before planting the sods. Five concentrations of diluted vinasse 0.0,2,4,6 and 8% were prepared and applied as a foliar application. The treatments started on the 1st of April in both seasons and repeated five times four weeks interval. The cut was done after three weeks from vinasse treatment. The results showed the application of compost at 150 g/ box resulted in the highest a significant increases in plant height, stolen length, rhizome length, root characteristics, vegetative growth dry weight , chlorophyll a, potassium and nitrogen content. Moreover applying vinasse at any concentration with or without compost treatment resulted in significant increase at any time of growing period in all studied parameters and the highest increase in these parameters was obtained after applying vinasse at 6 %.