All landscaped areas shall be finished with a natural topping material which may include, but not be limited to, the following: turf, groundcover, planting, decomposed granite (two inches minimum depth), river nm rock, expanded shale, or bark. No more than forty percent of the total irrigated landscape area shall be tuff. In developments with landscaping greater than ten thousand square feet, no more than ten percent of the landscapable area shall be turf. A pre-emergent herbicide shall be applied to the ground prior to the placement of natural surface materials (decomposed granite, river run rock, etc.) in any landscaped area to prevent weed growth.
(Ord. 1397.17.1 (part), 1991; Res. 1976 § 2 (part), 1991)