Keora (Sonneratiaapetala Buch.-Ham.faccourds for almost 95% of the successful mangrove plantations in the coastal areas of Bangladesh (RIMS 1997). In Chittagong coast, it constitutes 22% of the plantations. It is not much commercially valuable species. Moreover, the plantations are severely infested by a beehole borer, Zeuzera conferta (Baksha 1996). Replacement of S. apetala preferably by more valuable species that appear at later stages of succession is needed to ensure sustainability of the plantations. With this in view, underplanting trial in the established S. apetala plantations with different mangrove species was initiated. An interim report (Siddiqi et al. 1992) shows success and suitability of underplanting in western coastline