Samples of Ipil-ipil (Leucaena leucocephala) grown at PFRI Faisalabad were collected bimonthly for two consecutive years to assess variation in chemical composition of twigs and leaves. Chemical analysis indicated composition of 27 to 32 percent Dry Matter (DM), 23 to 28 percent Crude Protein (CP), 4 to 6 percent Ether Extract (EE), 20 to 26 percent rue Fibre (CF), 7 to 11 percent Ash and 32 to 37 percent Nitrogen-Free Extract (NFE) during different months. However, the variation in composition among different months was statistically non-significant.