Posted: 16/09/2015 at 18:12
Had a bit of a rethink smallswan. I remember a yucca being removed a few years back where I used to visit once a month. It was a fairly lengthy task over most of,the winter
trouble was the roots would continue to grow as I recall. I think the owners had a specialist in and treated it so I had a google. You need to remove all traces of roots so the recommmendation is to cut back the trunk to ground level, drill holes in fhe surface and apply strong strength SBK. This helps to kill the plant through to the roots. Then you can dig it out after a few weeks or so.
however, if you can I would though cut again a little lower.....scrape soil away to expose more trunk and drill holes again and pour in SBK root killer. Maybe repeating again a few weeks later. It should be enough to pre empt possibility of root growth.