Hamilton County sets no native-plant mandate. City landscape ordinances (Carmel and Fishers UDOs) require non-invasive, climate-appropriate plantings in regulated developments and encourage native species, while a well-kept native garden is not treated as prohibited rank vegetation.
No Hamilton County ordinance requires or bans native plants. In the cities, Unified Development Ordinance landscape standards (for example Fishers UDO Chapter 162 landscape regulations and Carmel's landscape requirements) govern required plantings in new developments and buffers, generally calling for non-invasive, hardy, climate-appropriate species and discouraging invasive plants. Native and pollinator plantings satisfy these standards and are encouraged. For single-family yards, the main constraint is the rank-vegetation/weed ordinance: an intentionally maintained native or prairie planting is not the same as neglected overgrowth, but tall, unmanaged weeds can still draw a notice under Carmel 6-88 or Fishers' high-weeds rule. Keeping native beds defined, mulched, and free of listed noxious weeds keeps them compliant.
There is no penalty for planting native species. However, an unmanaged planting that reads as rank vegetation or contains listed noxious weeds can be cited under the city weed ordinance or IC 15-16-8 and abated at the owner's cost.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Hamilton County, IN
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Hamilton County, IN
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Hamilton County, IN
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Hamilton County, IN
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Hamilton County, IN
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Hamilton County, IN
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See how Hamilton County's native plants rules stack up against other locations.
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