A Guide to Successful Pruning, Shrub Pruning Calendar A Guide to Successful Pruning, Shrub Pruning Calendar A Guide to Successful Pruning, Shrub Pruning Calendar Shrub Pruning Calendar when to prune pubs.ext.vt.edu/430/430-462/430-462.html pubs.ext.vt.edu/430/430-462/430-462.html Pruning/pruning calendar II pubs.ext.vt.edu/430/430-462/430-462.html pruning guides. https://pubs.ext.vt.edu/430/430-462/430-462.html