Jackbean (Canavalia ensiformis(L.) DC.), is considered one of the few pulses that grow really well on the highly leached, nutrient-depleted lowland tropical soils. Natural pollination with its close relative, the swordbean (Canavalia gladiata(Jacq.), offers exploitable opportunities for gene introgression and varietal improvement without the necessities of artificial pollination. This paper reports the growth, biomass yield, nodulation and seed quality of advanced generation lines derived from the natural crossing of jackbean with swordbean.