Abstract: A pot experiment was conducted in the greenhouse to evaluate the effect of calcium carbide (as a source of ethylene) on some agronomic parameters of wheat (Triticum aestivum L., var. Inqalab-91) that was grown without or with two levels of N, P and K fertilizers (120-90-60 kg ha-1 and 60-45-30 kg ha-1). Half dose of N and full dose of P and K was applied at sowing while remaining half after one week of germination. Calcium carbide as a source of ethylene was applied at 60 kg ha-1 after 2 and 8 weeks of germination. A factorial completely randomized design was followed with nine treatments each with three replicates. Data regarding plant height, number of tillers, length of spike, number of spikelets spike-1 and grain yield was recorded. Plant height, number of tillers and spike length were significantly affected when CaC2 was applied after one week of germination while number of spikelets and grain yield was maximum when CaC2 was applied after 8 weeks of germination.