You can geht that trophy pretty soon, after unlocking the the "Wothy Village" Milestone. That Milestone should be somewhere around 1000 population.
If you keep all you commerical areas together till this point, simply create a commercial zone, that contains all your commercial areas, and special it to "Organic and Local Produce".
After some time the existing buldings will be gone, and the specialized "Organic and Local Produce" buldings will appear.
Just leave it alone for some minutes, and the trophy will pop.