It will certainly slow the current loss of rural voters. The main reason Labour historically struggles to get rural voters is that they are hard on farmers. However they had taken a break from going after farmers due to the death of tourism.

Also generally I would say that the Green's biggest weakest is their approach never really incentivises better farming practises. The strategy is normally a blanket tax which encourages more cost cutting to stay in business or regulations that just equal a bunch more paperwork. There is no talk of encouraging practises that build up topsoil (trapping CO2) or tube wrapping (uses half the plastic per bale).