The present investigation entitled "Influence of seedling age and plant hormones on growth, yield and bolting in onion (Allium cepa L.)" was undertaken at Experimental Farm of Division of Vegetable Science and Floriculture, SKUAST-J, Chatha during Rabi season of 2014-2015. The experiment was laid out in factorial RBD comprising of three seedling ages viz. 6, 8 and 10 week old seedling and seven plant hormonal treatments viz. C1 (Cycocel 500 ppm), C2 (Cycocel 1000 ppm), E1 (Ethephon 2000 ppm), E2 (Ethephon 2500 ppm), P1(Paclobutrazol 1000 ppm), P2 (Paclobutrazol 2000 ppm) and C0 (Control).