By Jgh
United Kingdom 
I need to cut back my wisteria quite heavily this year as it has grown away from the wall quite considerably. It is about 25 years old and has quite a spread. Would it be better to complete the whole plant at one go or do half this year and half next ?
20 Dec, 2015
Answers
25 year old Wisteria and you want to cut it... do you have to?... can't you just move the house?... what? not even a little?
such a shame. Oh well, you gotta do what you gotta do.
23 Jan, 2016
Depends whether you can bear to be without flowers - the plant will grow again even if you cut it back to the main trunk, taking off all growth during winter, but you won't get flowers for a while. So you might want to select parts which may flower this coming year and cut back hard on the rest - but what you cut back hard this year may well not flower again for longer than a year or so. Personally, I'd do it all at once and retrain the new growth...
20 Dec, 2015