The present study was carried out at the experimental farm of Faculty of Agriculture Benha University, Egypt during the two growing seasons of 2017/2018 and 2018/2019 to comparison the three different forms of boron fertilization i.e. chelated boron, Nano-boron and boric acid on broccoli F1-hybrid "Larson RZ" growth and yield under different planting dates i.e. 1^st, 15^th and 30^th October, respectively. The obtained results confirmed that all broccoli growth traits, head yield and quality significantly affected by planting date, boron forms and their interactions in both seasons. The data confirmed that all growth traits, head yield and chemical properties gradually increased with delaying planting date. leaves number, foliage fresh and dry weight/plant, number of primary and secondary head, head weight, total head yield/plant, head content of ascorbic acid and total carbohydrate were recorded in broccoli plant that planted in the end of October in both seasons. All boron forms resulted in significant increase all growth traits, head yield and head chemical properties compared with the control. The highest measured data were recorded in broccoli plant that treated with chelated boron followed by Nano-boron in both seasons. Broccoli plants that treated with chelated boron in the late planting date (end of October) recorded the highest vegetative growth, head yield and head quality. It can be recommended to plant broccoli plants at the end of October with foliar spray with chelated boron to get the highest head yield with best quality.