Two field trials were carried out at a sequestered Farm in El-Zarqa City, Damietta Governorate, Egypt, throughout 2020/2021 and 2021/2022 seasons to investigate the effect of biochar (at 2000 kg/fed) and humic acid (at 5 kg/fed three times) soil addition and foliar application with trehalose (at 500 ppm) and seaweed (at 1000 ppm) under chemical NPK fertilizers levels (100, 75 and 50 % of the suggested quantities) on growth, yield and its components and quality of pea. This experiment was carried out in a split-split plot design with 3 replications. Data showed that each increase in chemical fertilizers (NPK) levels from 50, to 75 and 100 % accompanied with significant increases in all studied characters. Soil adding of humic acid at the rate of 5 kg/fed three times were the best soil additions treatment, which produced the highest values. There were considerable alterations in of growth, profit and its components and quality of pea amongst both foliar submission conducts and control conduct the highest values from foliar spraying plants three times with seaweed at the rate of 1000 ppm. It can be decided that to sustain highest growth, yield and its components and quality of green seed of pea at the identical time diminish production charges and ecological contamination when plants treated with humic acid at 5 kg/fed three times and mineral fertilizing with 75% and foliar scattering pea plants 3 times with seaweed at 1000 ppm.