The flowering observations generally are the most sensitive - regarding the environmental conditions and reflect each year the going of meteorological conditions. During the years on long time period are observed the changes, that are a reflection or not of climatic conditions on that particular area.

In our study we will tray to evidence what happen about the initiation process of flowering at some agricultural plants. As can see at the following graphic the phenological data for a long data serie from 1973 up to 2000 presents a moderate tendency of advancing in time, regarding that particular phase for the maize plants in a phenological station (Pogradec) on southeast of Albania. The same tendency (trend line) is observed also to the phenological data of the first date of flowering (10% of plants observed) at the potato plants in Puke phenological station (North of Albania).