The effects of latitude, burning, and pruning on the growth cycle of the blueberry were studied and found to be as follows. The morphology of the growth cycle and the sequence of morphological changes were not altered by any of the factors considered. For spring and summer, a north and south difference of one hundred and fifty miles had no greater effect than that which is regarded as "seasonal". Burning and pruning delayed the spring and summer growth by about two weeks. For the late autumn and early winter, there was some evidence that morphological changes occurred in the distal florets during that period, but for the "depth of winter", that is from mid-December till the end of February, the winter bud was a morphological complex that, with the exception of the apical floret, always had the same structure regardless of latitude, burning, or pruning and this structure was the same as that found in normal plants during that season.