Lake County actively encourages native Illinois prairie and woodland plants for stormwater management and pollinator habitat. Native plantings are exempt from grass-height nuisance rules when properly maintained.
Lake County Stormwater Management Commission and the Lake County Forest Preserves District promote native plant landscaping including prairie grasses (big bluestem, little bluestem, switchgrass), native wildflowers (purple coneflower, black-eyed Susan, butterfly weed), and woodland species for lakefront and riparian buffers. The Lake County Watershed Development Ordinance (WDO) favors native vegetation in stormwater buffers around the Fox River, Des Plaines River, Chain O'Lakes, and Lake Michigan shoreline. Illinois 525 ILCS 20 Illinois Natural Areas Preservation Act and local policies recognize native plantings over 8 inches as lawful when part of a managed landscape plan. Homeowners should document native plantings with a simple site plan or registration with the Conservation at Home program to avoid weed-nuisance complaints. Invasive species like buckthorn, garlic mustard, and Japanese knotweed are discouraged and their removal is supported by county cost-share programs.
Generally no violations for intentional native plantings. Unmaintained areas that become weed-infested may trigger nuisance complaints resolved through documentation. Invasive species infestations on property may be subject to abatement notices.
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