detaching a climbing hydrangea
One of my clients is having her fence rebuilt and she has two old climbing hydrangeas growing on it, a H. Seemanii and an a H. anomala subsp.petiolaris. I told her that were we to prune it all down, it'd probably take years for the two climbers to grow back to where they are now (about 3 metres high)so she has insisted we improvise a support system while the fence is being rebuilt...My question is the following: will these two climbers grow new adventitious roots once it is reconnected somehow to the new fence (wooden btw)? Or do adventitious roots only grow on new stems? Is there anything I should do in order to prompt this regrowth? Any tips on how to secure the climber closer to the wall than just by using twine?
Many thanks for all answers and tips in advance.