The ever-increasing demand for food has led to the widespread use of chemical fertilizers, which in turn has exacerbated environmental problems. One of the known solutions to reduce these biological hazards is to use foliar amendments to provide good nutrients to plants and replace chemical fertilizers with biological ones, which improves the physical and chemical properties of the soil and conserves available resources. This experiment was conducted as a factorial experiment based on a completely randomized block design with three replications. The experimental treatments included nano boron fertilizer at two levels (N₀: without nano boron fertilizer and N₁: foliar fertilization with nano boron fertilizer), biochar at three levels (B₀: without biochar, B₁: peanut shell biochar, and B₂: Azolla biochar), and mycorrhizal fungi at two levels (M₀: without mycorrhizal inoculation and M₁: mycorrhizal inoculation). The experimental results showed that the interaction effect of foliar fertilization with nano boron, biochar application, and inoculation with mycorrhizal fungi on the studied quantitative traits (e.g., green pod yield, grain pod yield, grain yield, number of seeds per plant, number of pods per plant, and weight of 100 seeds) and qualitative traits (e.g., grain nitrogen, phosphorus content, and percentage of grain protein) was significant. According to the results, the highest yield of green pods (23,180 kg⁻¹ ha), grain pods yield (13,230 kg⁻¹ ha), grain yield (8953 kg⁻¹ ha), and seeds per plant (160.3) were obtained in foliar fertilization with nano boron without biochar and mycorrhizal inoculation. In addition, foliar fertilization with nano boron, application of Azolla biochar, and no inoculation with mycorrhiza had the highest content of nitrogen (3.98%) and grain protein (33.87%). Thus, according to the results of this experiment, proper and balanced nutritional management of peanuts leads to better yields. Foliar fertilization with nano boron can help to increase the quantitative and qualitative yield of peanuts. Biochar application and inoculation with mycorrhizal fungi conserve the available resources, improve the soil’s physical and chemical properties, and increase the quantity and quality of peanut seeds.