Not sure if it will have what you are looking for but there is
Kingston Maurward College | Dorchester | Dorset | UK near to where I live.
I know people who have been to Lackham and Sparsholt both colleges with good reputations and they have gone on to start up their own businesses in agriculture/forestry.
There is also:
::::: Bicton College ::::: Welcome Duchy College : Home
but I have no idea how good/bad they are!
Hope this helps. Welcome to WAB...
Jane