some more ideas:

create photographs with unusual motifs like:

a fridge in the middle of a desert
sculpture made out of fruits and vegetables in the snow
a pyramid of pumpkins (or a Buddha statue)

Interview your farmers and give a picture of them, what is special about them? What do they stand for, what is their vision of the future, do they have interesting family stories to tell? Mold all this into a story with excellent photographs and design and give it to the press. You should establish a contact to at least two or three chief editors of newspapers or magazines/TV, invite them to have a tasting at the farms, make a summer festival there.

I have many ideas but nothing really works without some budget.