The following are exceptions to the provisions of this chapter:
1. Vegetable and/or flower gardens, purposefully planted, are permitted to exceed 12 inches in height if they are maintained free of weed hazard or nuisances.
2. Woody perennials, purposefully planted, are permitted to exceed 12 inches if they are planted and maintained in compliance with this chapter.
3. Weeds, vines, brush, and grass exceeding 12 inches in height are permitted on parcels upon which development has never occurred and which are not located within 300 feet of developed areas so that such uncontrolled growth will constitute a weed hazard or nuisance to developed areas.
4. An owner of property may apply to the City to designate appropriate areas as a natural grass or prairie or woodland forest area. Such designation shall be determined by the Mayor, with such consultation as may be necessary to determine if the species mix and/or horticultural care methods for the area are appropriate for such designation. Growths in areas so designated are permitted to exceed 12 inches in height.