..this is an invasive Aster, so beware.... usually sold as Aster ageratoides 'Ashvi'...

...I only planted it last August and it's already running like mint does... there is another variety called 'Asran', I suspect it has the same kind of propensities..

… I bought it online and they never tell you in the descriptions about these things... and I highlight it because 'Ashvi' is a fairly new plant for us, and has a very long flowering season from July to winter.. so it's obviously tempting to buy..

...it's a shame because I do enjoy the pretty white flowers but this is not for my garden, so I've put some of it in a pot to contain it... and that's where it will stay..

...the piece at bottom left is what I originally planted last Autumn... the spread is top right and further..

..running roots...