General flowering (GF) plays a major role on the regeneration of diptocarp forests, and remote sensing assessments can provide quick and cost-effective way of analyzing such events. However, remote sensing assessments, particularly the detection of GF events remains an unexplored topic. GF events can be detected by human eyes because of full of red-winged fruits in the tree crown. Therefore, we hypothesized that there is a change in reflectance during GF events, which can be detectable with satellite images. The present study, using Landsat images (TM, ETM+, OLI) over 21 year (2000-2020) investigated GF events. Occurrence of GF events were monitored at ground level and recorded at 85 forests across the peninsular Malaysia between 2000 to 2014 by Azmy et al. (2016). We calculated mean Normalized Difference Vegetation Index (NDVI) for the major GF events (2001, 2005, and 2010). Overall, mean NDVI was higher in non-fruiting forests than fruiting forests, but this was only significant in 2001. The reduction in NDVI in fruiting forests was probably resulted from the reduced greenness of the canopy during the events. However, the NDVI difference was not very obvious. Further investigation such as timeseries modelling maybe helpful for deducing the subtle differences.