Vegetative and floral phenological observations were conducted on Bruguiera gymnorrhiza (L.) Lam., Rhizophora mucronata (Lam.) and Avicennia marina (Forssk.) Vierh. in Mgeni Estuary. In shoots of B. gymnorrhiza in the sun, semi-shade and shade, leaf emergence showed high values in the warmer months with low values in the cooler period of the year. Although leaf abscission did not show clear trends as in the case of leaf emergence, values were generally lower during the cooler (and also dry) months. In all of the above light regimes the number of leaves/shoots showed a decrease over the 5-year period of the observations. However, longevity of leaves was influenced by exposure, with sun, semi-shade and shade leaves having a mean lifetime of 89,3; 103,1 and 141,8 weeks respectively. Highest numbers of propagules were borne on shoots in the sun, none was produced in the shade, while an intermediate number was found in semi-shade. In R. mucronata, data for leaf emergence and abscission showed similar trends to those obtained for B. gymnorrhiza. The number of leaves/shoots increased during the 4 years of observations. Leaf longevity averaged 99,4 weeks which was longer than obtained for Rhizophora spp. by previous workers. Observations had to be curtailed on A. marina which revealed a bimodal leaf emergence pattern with low figures for leaf abscission only in the winter months. Leaf longevity averaged 56,4 weeks which compared well with results from other workers. The significance of these results for litter production and degradation is considered. Vegetatiewe- en blomfenologiese waarnemings is op Bruguiera gymnorrhiza (L.) Lam., Rhizophora mucronata (Lam.) en Avicennia marina (Forssk.) Vierh. van die Mgeni-riviermonding uitgevoer. Op takke van B. gymnorrhiza, blootgestel aan volle son, halfskadu en skadu, toon blaarverskyning hoë waardes gedurende die warm maande en lae waardes gedurende die koeler periodes van die jaar. Alhoewel blaarafsnoering nie sulke duidelike tendense toon as in die geval van blaarverskyning nie, was die waardes in die algemeen laer gedurende die koeler (en droër) maande. In al die bogenoemde ligtoestande, toon die getal blare/lote ’n afname oor die waarnemingsperiode van 5 jaar. Langlewendheid van blare was egter beïnvloed deur blootstelling: blare in son, halfskadu en skadu besit ’n gemiddelde lewensduur van 89,3; 103,1 en 141,8 weke onderskeidelik. Die hoogste aantal propagules is gedra op takke blootgestel aan volle son, geen op skadutakke terwyl intermediêre getalle op takke in halfskadu gevind is. By R. mucronata toon data vir blaarverskyning en afsnoering dieselfde verskynsel as dié verkry by B. gymnorrhiza. Die aantal blare/takke het toegeneem gedurende die 4 jaar van waarneming. Langlewendheid beloop gemiddeld 99,4 weke, wat langer was as dié wat deur vorige navorsers by Rhizophora spp. gevind is. Waarnemings moes ingekort word by A. marina, wat ’n bimodale blaarverskyningspatroon volg, met lae blaarafsnoeringswaardes slegs gedurende die wintermaande. Langlewendheid van blare is gemiddeld 56,4 weke, wat goed vergelyk met die resultate van ander navorsers. Die belangrikheid van hierdie resultate met betrekking tot blaarvalproduksie en -afbraak word in berekening gebring.