“…It has widely used in enhancing the growth and development of several plants due to it contains plant growth hormones (auxins, gibberellins and cytokinins) and amino acids, vitamins and many nutritional elements like, N, P, K, Ca, Zn, Mn, Fe, B, Cu, Co and Mo (Begum et al, 2018;Stirk et al, 2004;Zamani et al, 2013). The unique role of seaweeds extract in augmenting the growth have to be discussed on guar (Abd El-Aal et al, 2022;Ramya et al, 2011;Thirumaran et al, 2009;Vijayanand et al, 2014) on fenugreek (Mahmoud, 2021;Mahmoud et al, 2021;Tarraf et al, 2015) on roselle, regarding the yield, Vijayanand et al (2014), Khater and Rania (2016) on guar, Rathore et al (2009) on soybean, Zodape et al (2010) on mung bean, Arthur et al (2003) and Jayasinghe et al (2016) on pepper, Zodape et al (2008) on okra, Mahmoud et al (2021) and Mahmoud (2021) on roselle, besides El-Leithy et al (2019) on Plectranthus amboinicus, concerning chemical constituents. Therefore, the objective of this investigation was to study the impact the of compost as organic manure, some stimulant substances (chitosan, amino acids and seaweeds extract) and their interactions on plant growth traits, yield and active ingredient of Alexandrian senna (Cassia acutifolia Delile) plants to figure out the most suitable treatment for improving these characteristics.…”