In article , Steve
Harris writes
I have some areas of thymus vulargis, vinca minor, and a campanula being
invaded by long, very fine grass - in quantity. I've tried pulling it
out but it comes back. Digging it out would mean digging out the wanted
plants, removing all the grass roots and putting them back :-(

Is there an easier way? Or should I glyphosate the whole area in spring
and start afresh?

Well, if you're thinking of glyphosate and starting afresh, you might as
well dig up the wanted plants, in which case you might as well dig.

I think I know the grass you mean, and it's a pest. Dense mats of fine
roots which don't come up when you pull. Fescue?

The campanula is the real problem - the vinca and thyme you should be
able to pull back and get at the soil to dig at the grass.
--
Kay
"Do not insult the crocodile until you have crossed the river"