I recently fielded a query about moving a shrub: Was this a good time to do so, or would the spring be better? I responded that either was all right, but that spring might be better. There is no clear answer among experts, some favoring spring, some fall.I know from my readings that scientists have determined trees and shrubs use photosynthesis to create and store excess carbohydrates in their roots during the summer, and then use them to extend their roots in the fall.