I have a grassy bank that I wanted to plant bushes on, so I planned to
kill the grass there with glyphosphate, and after it died planted the
bushes.

I have now realised that I did not use glyphosphate but "Pathclear".

I planted the bushes in large holes with lots of compost and watered
them well and they seem OK at the mo. Will I get away with it or are
they doomed?