Indiana law designates specific noxious weeds that landowners must control regardless of local ordinances. The state mandates Canada thistle, Johnson grass, and other listed species be eradicated, with county weed boards authorized to enforce statewide requirements on private property.
Indiana Code 15-16-7 and 15-16-8 establish state authority over noxious weed control. Landowners are legally required to destroy designated noxious weeds including Canada thistle, Johnson grass, shattercane, Russian thistle, and Columbus grass. Local county weed control boards may enforce these state mandates, issue notices to landowners, and arrange remediation if owners fail to comply. Costs of state-ordered remediation become a lien on the property. Cities and towns retain authority over general lawn maintenance and grass height, but the noxious weed list and core enforcement framework apply uniformly statewide.
Failure to control noxious weeds may result in county-ordered destruction at owner expense, with costs assessed as property tax lien.
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