I think digging out what comes to close to the path is the best option, but make sure you get it all, even little bits of root will shoot again. I am still pulling up new plants from an acanthus I 'removed' 2 years ago in my own garden. Regularly picking the leaves off seems to keep it under control, or slowly eradicates it. Also, you are saying it has not flowered, does it get enough sun? You could dig up the bits that are coming to close to the path and maybe replant them in a sunnier position? Good luck! Franne R.
How can I control the very strong expanding roots of my Acanthus? It has not flowered this year but I'm getting lots of shoots and I am concerned it may damage the concrete steps and path with its deep roots.
Posted: Monday 14th of November 2011 10:34 PM Last reply: Monday 7th of April 2025 08:25 PM
my Acanthus has not flowered this year but it has developed a very strong invasive root system going under concrete steps next to it. How can I controlled it as I'm worried it may damage the steps? Soil is clay.
Posted: Monday 14th of November 2011 10:30 PM Last reply: Saturday 1st of March 2025 03:48 AM