JK wouldn't do that for the simple reason that last year's harvest is what's supplying 2006 sales (scope the 12/31 filing or annual report for the inventory surge with explanation). If the 2006 crops withered on the vine (except strawberries!) it would decimate 2007 and they haven't issued guidance that far out.
All indications are a very good year for precipitation and they focus on areas predominantly in the rainbelt being influenced by Alberta cold fronts. A bad year in the future might mean only meeting earnings while good years will mean beating. With organic food sales pounding down the doors of America, there is no question where this company is headed.