I have placed a hive on an old baggage scale. This will permit me to measure the hive weight change daily. Thus I should be able to identify the dates of the major honey flows in my area. Bees enter and exit the indoor hive via two PVC pipes plumbed through the honey house wall.
The data has been compiling since 4/22/2014
Click to view spreadsheet: File update: 6/16/2014