I have an old and sprawling rosemary which needs a serious chop. How
much can I
take off without killing it?

Thanks )
Lorraine


I dont think your Rosemary will regenerate from 'brown' wood. So cut
into the green parts all you like, but dont go down into the brown.

If it really is much too big then you will not be able to reduce the
size enough without cutting into the brown wood. In which case
cuttings are your best bet.