To retrieve chill units from the blueberry chill model, choose a state, station, and season of interest.
This project is being done in collaboration with Bill Cline and Benny Bloodworth in the NCSU Department of Plant Pathology, and the North Carolina Agricultural Research Service (NCARS).
* Model accumulates 1 point for average hourly temperatures below 45° F; 0.5 point for temperatures 45-55° F; -0.25 point from 55-65° F; -1 point for temperatures 65° F and above. The model begins when it has a positive balance that is not negated by warmer weather. Once 800+ chill hours have accumulated, points are no longer negated for temperatures 55° and above. The model ends February 28 at midnight.
Model developed by Dr. Mike Mainland, Professor Emeritus, NCSU Department of Horticultural Science.