Fact Sheet No. 223, UMaine Extension No. 2093 Prepared by Lily Calderwood, Wild Blueberry Specialist, David E. Yarborough, Extension Blueberry Specialist, and John M. Smagula, Emeritus Professor of Horticulture, The University of Maine, Orono, ME 04469.  Revised December 2020. The wild blueberry is a slow-growing woody plant.  It spreads by means of an underground horizontal