Layered Double Hydroxide (LDH) has been recently established as an effective means to remedy nutrient-polluted water. As an efficient low-cost alternative to established remediation methods that is easy to produce and scale, its application as a water treatment relies on the potential for nutrient pollution to be recycled as a controlled-release fertilizer. In this project, Mg-Al LDH was synthesized, dispersed on biochar, and adsorbed with phosphorous to obtain a P-LDH/BC complex. The P-LDH/BC complex was characterized for chemical properties including stability, surface area, and available nutrient content. The P-LDH/BC complex was studied for its efficiency as a controlled-release fertilizer in green beans (Phaseolus vulgaris) and compared to standard industry fertilizer in a greenhouse experimental study. Based on preliminary analysis, the synergy of biochar and LDH resulted in an improvement in the key growth indicators in green beans compared to standard fertilizer, including yield, nutrient content, height, dry weight, and chlorophyll index. Furthermore, the effects of the P-LDH/BC complex on the rhizosphere and nodule microbiome was studied using molecular DNA extraction methods and related to the key growth indicators. The P-LDH/BC complex is predicted to show an improved microbial activity in the rhizosphere and contribute to an improved soil microbial health in comparison to standard industry fertilizer.