The study determined the essential elements of reeling wastewater for agricultural use, specifically its effects on sprouting percentage, rooting percentage, length of roots, weight of roots, number of shoots, length of shoots and weight of shoots of mulberry saplings, and the best storage duration of reeling wastewater. The study was conducted at DMMMSU- Sericulture Research and Development Institute, Bacnotan, La Union using its registered mulberry variety, Alfonso. The experiment was set up in Randomized Complete Block Design with three replications. Results revealed that stored reeling waste water contains higher NPK with micro elements necessary for plant growth and development. Besides, it has higher EC (2.80-5.10) than tap water (0.54). Considerably, stored reeling waste water has lower pH (6.17-6.36) than tap water (7.29).Reeling wastewater stored for one (1) month, two (2) months and three (3) months, significantly affected mulberry sapling growth parameters such as. The essential nutrients needed by mulberry saplings are present in reeling wastewater even if it was stored up to three months. Reeling wastewater stored up to three months contains the essential nutrients for growth of mulberry saplings particularly the length and weight of roots and shoots.