By Linmar
Hertfordshire,
United Kingdom 
I have an 8yr old Cytisus Battandieri half of which has reverted to the root stock of Laburnum. Is this a common problem? I had not noticed until the Laburnum had taken a real hold. If the Laburnum branches are removed I imagine they will just keep growing back.
Next year thinking will replace with a new Cytisus B. Will this be the best solution?
13 Jun, 2015
Answers
The only trouble is, there's a real risk the new one you buy is also grafted onto laburnum rootstock...
13 Jun, 2015
Growth from the rootstock is always a potential problem. Why not take cuttings from the cytisus to be sure that you don't have this in the future?
If you don't want the laburnum you should be able to cut it down but you will need to make sure that the cut doesn't get infected and put the root at risk.
13 Jun, 2015
Bathgate I think that might well be the best way around the problem and plant some other place.
Bamboo - I believe they are all grafted on to Laburnum but I will make sure I keep an eye on it in future and nip off any reversions early.
Urbanite - The only problem with cuttings is they will take years to grow into a largish tree and I don't want to wait that long. I have taken off some more of the Laburnum and might saw it all off and see what happens.
Thank you all for your thoughts.
13 Jun, 2015
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I would replace it rather then fight that "demon."
13 Jun, 2015