Posted: 06/05/2017 at 18:41
You really need to wait until the foliage has died down completely (ie when it is all brown and crispy.) If you remove the leaves and stems before that happens there is a good chance the glyphosate won't have translocated to the roots and it could come back with a vengeance. Assuming you do wait, I think your plan will work and you can spot-treat any reappearing ground elder. As long as you didn't spray the snowdrops and bluebells they should come back even with a raised ground level as both bulbs are capable of coping with that. If planted too deep the flower stems swell at a point nearer the surface and these swellings become the new bulb.