A floral calendar for beekeeping is a time-table that indicates to the beekeeper the approximate date and duration of the blossoming periods of the important honey and pollen plants in the apiary area.
The floral calendar is one of the most useful tools. The calendar informs beekeepers about what to expect in bee-forage availability, and when, so that they can manage their colonies in the most rational manner. Beekeeping in any specific area cannot develop without an understanding of the calendar, and for migratory beekeeping, special calendars for the different foraging zones along the migration route are required.
Reference: http://www.fao.org/docrep/x0083e/X0083E04.htm#Chapter 3 Bee forage and floral calendars
