The kaffir is used for the aroma, either from its fruits or leaves. Only after the influx of "tom yum" in Malaysia about some 20 years back, sees the popularity increase of the kaffir leaves used in cooking soup. Otherwise, it is used as one of the many herbs for the "mandi serum" for mothers in confinement and the sicks, to help improve blood circulations.
While the kalamansi is getting popular about the same time as kaffir - used as drink or milder alternative to lime.
The lime sapling, bought in Balok Pasar Tani at RM9/tree - from branch graft - so it is ready to produce fruit anytime...
The lime flower - emitting sweet citrus aroma. Look at the flower bud - a bit strange, with its 4 halves, but blooming out 5 petals...