According to the State of New Hampshire's Agricultural Incentive Zoning signage is an important aspect of viable agricultural enterprise and it differs greatly from commercial uses. Consider exempting agricultural signage from regulation. Temporary signage that change with the seasons and crop availability and off site signage may be critical to farm success.
Currently Windham does not allow temporary signage for agriculture but the State of New Hampshire does allow temporary signage for agriculture. For more information regarding agricultural laws in New Hampshire visit: http://des.nh.gov/organization/divisions/water/wmb/repp/documents/ilupt_chpt_1.7.pdf