Indiana Detrimental Plant Destruction Duty

Indiana's duty is blunt: "A person owning or possessing real estate in Indiana shall destroy detrimental plants by: (1) cutting or mowing and, if necessary, by plowing, cultivating, or smothering; or (2) using chemicals in the bud stage of growth or earlier," per Indiana Code § 15-16-8-3. Section 15-16-8-1 names the covered species, Canada thistle, Johnson grass, Columbus grass, bur cucumber, shattercane, common and tall waterhemp, marestail, Palmer amaranth (carelessweed), poison hemlock, Powell amaranth, rough pigweed, and smooth pigweed, and adds that in residential areas the duty also reaches "noxious weeds and rank vegetation" of any kind, though it excludes agricultural crops.

The township trustee runs enforcement under § 15-16-8-4. If the trustee has reason to believe detrimental plants are growing on a property, the trustee may enter to investigate after giving the owner 48 hours' notice, or may simply do a visual inspection from outside the property line. Once the trustee determines detrimental plants are present, written notice goes to the owner or occupant, who then has five days from receipt to destroy the plants. Miss that window and the trustee has the plants destroyed within eight days by whatever method is most practical, including hiring a contractor, and the trustee or contractor is shielded from civil or criminal liability for crop or property damage during the work except for gross negligence or willful destruction. Counties that have organized a county weed control board under IC 15-16-7 can take the case over from the trustee instead. Cost recovery runs through the tax system rather than a straight fine. The trustee may pay for chemicals, labor, and power equipment, plus $20 per day for supervising the work, then files a certified cost statement with the owner under § 15-16-8-6. If the owner doesn't pay within ten days, § 15-16-8-7 sends the statement to the county auditor, who places the amount on the property's tax duplicate and collects it the same way as delinquent taxes, including, per § 15-16-8-9, any penalties, forfeitures, and sales that come with unpaid taxes. A tax-exempt property owner who doesn't pay risks losing the exemption entirely under § 15-16-8-8(c).

Indiana has no separate weed-control fine; the penalty is the tax system itself. Unpaid trustee cost statements go to the county auditor under § 15-16-8-7, are added to the property's tax duplicate, and are "collected as taxes are collected": under § 15-16-8-9, that includes any penalties, forfeitures, and sales attached to delinquent taxes. A tax-exempt owner who doesn't pay loses the exemption under § 15-16-8-8(c). Trustees and their hired workers are shielded from liability for damage while doing the work, except for gross negligence or willful destruction, under § 15-16-8-4(c).