A client has a mature 7ft tall snowball viburnum which 2 years ago had a wind damaged branch fall on it essentially splitting it in two. The affected main stems were split but not severed and so were wrapped in an effort to graft it back together.
The whole shrub is now pretty healthy but has two very distinct halves. The front has the usual growth and snowball type flowers but in the rear half the shoots are all poker straight and the flowers are almost completely different as they are much like a lace-cap hydrangea.
Any suggestions of what to do with the long term aim being to 'weed out' the inferior growth?
Sorry for the bump but i know all the plantsmen/ plantswomen take bank holidays off.... just kidding no descrimination here
Sounds like the root stock, which is possibly the native species guelder rose (Viburnum opulus) is sending up vigorous suckers so these need to be cut right back if you want to keep the grafted cultivar?
Its kind of the opposite actually, the original plant and therefore rootstock is the better half we want to keep and the 'graft' which is problematic growth