The combination of hot water and various soaking periods was successful in breaking the dormancy of two lines of Leucaena leucocephala (Lam.) De Wit, cultivars 'K8' and K67. The germination percentage obtained indicated a differential response of the two lines to the various treatments. In general, these results confirm those of other workers reported in the literature. Temperature had a more significant effect on seed germination than did soaking time. For practical purposes these results suggest that large amounts of Leucaena seeds may be scarified satisfactorily by immersion of seed for 2-5 min in water at 80°C or for 2-5 s in water at 100°C. The latter treatments are perhaps more feasible as they may be made without the use of a thermometer.