Biomass production by plants of Ipil Ipil (Leucaena leucocephala) planted at six different spacings at Pakistan Forest Institute was studied. The plants of 6 months, coppice shoots of 1 year and 2 year and 3 year age were harvested for determination of biomass. It was found that spacing i.e. 0.50 x 0.50m to 1.50 x 1.25m gave more biomass than wider spacings where the yield had been almost the same. Harvesting annually or biennially did not make much difference in biomass production and cattle feed frequent harvesting is preferred. The plants may be planted at a wider spacing and retained for more then two years for uses like charcoal, poles, posts and agricultural implements.