In article ,
Jeff Layman wrote:

The biggest problem is the Spanish bluebells which get beneath the
membrane and take ages to dig out. It took over 5 years to clear them,
and yesterday I discovered another half dozen! I will triple-spray them
with glyphosate over a week before attempting removal in a month.

In my experience, the glyphosate is a waste of time. They need to
be dug out when in leaf, so you can find them.


Regards,
Nick Maclaren.