These investigations were conducted to study the influence of N and K drip fertigation along with boron foliar spray on growth, seed yield and seed quality of onion (Allium cepa L.). The experiments were carried out during two consecutive years (2014-15 and 2015-16) at experimental farm of Department of Seed Science and Technology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan-173230 () using randomised block design. N and K fertilizers were applied through drip irrigation at three different levels viz; 100 %, 80 % and 60 % of RDF as twenty different combinations in 10 equal splits at 15 days interval along with boron foliar spray. The results revealed that N and K fertigation along with boron foliar spray treatments gave significant results on plant growth, seed yield and quality parameters. Among all the treatments N100K100B1 ( cm) exhibited maximum plant height, minimum days to 50 % flowering (), number of flowering stalks per plant (), number of umbels per plant (), number of umblets per umbel (), number of seeds/umbel (), seed yield /hectare (), 1000 seed weight ( g), germination %age ( %), seedling length ( cm), seedling dry weight ( mg) and seedling vigour index I and II ( and ). | Effect of drip fertigation and boron foliar spray on growth, seed yield and quality of onion (Allium cepa l.) Cv. Palam lohit