How and when leaf flushing occurs in Mango?

The postharvest dormancy is broken by the first summer vegetative flush, which usually coincides with the wet sea-season, slowing as the climate and soil dry out. The leaf-flushing period can have one to five flushing events, with the whole canopy flushing in synchrony or in patches. In years of poor flowering and cropping, several leaf flushes can occur during the flowering and fruiting period.  Although mango is an evergreen tree, large quantities of old leaves are shed during vegetative flushing. The fallen leaves become mulch under the tree, where nutrients are recycled from old leaves to the new leaves.