Information on the effect of seed size (and spacing) on the germination and growth of Moluccan Sau (Albizia falcataria (L.) Fosb.) seedling is important to nursery operations. Ordinarily, it is expected that bigger seeds would have higher percentage of germination and produce healthier and bigger seedlings than smaller ones. Narrow, medium and wide seeds were sown directly into pots arranged according to various spacings at nursery. Data were collected on seed germination, seedling growth, and the soil.