Waukesha County

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Help the Waukesha County Park System Control Garlic Mustard 

Volunteer for self-led garlic mustard removal in our parks in the spring and summer. See park location options.

Open to volunteers of various ages, skills, and abilities. Adult supervision is REQUIRED for the duration if a volunteer is under the age of 18. Dress for weather conditions, wear boots and bring your own work gloves. 

All interested participants must fill out a Volunteer Interest form first. Once approved, participants will receive further instructions (video, map, and work report form). Park entrance fees are waived for the duration of the volunteer project.

Learn to Identify Garlic Mustard

Garlic Mustard
Alias: Alliaria petiolata

This fast-spreading weed is very invasive and is threatening natural areas throughout the park system. Garlic mustard starts growing earlier in the season than Wisconsin's other native plants and outcompetes them. It spreads rapidly in wooded areas, forming tall, dense stands that smother native wildflowers, and native tree and shrub seedlings.

Garlic mustard is a winter annual herb that generally grows 2-4 feet tall. The lower leaves are kidney-shaped with scalloped edges. Leaves feel hairless, and the root has an "S" or "L" shape just below the stem base. In spring, roots and new leaves smell like garlic, and small, four-petal white flowers appear clustered at stem ends, followed by long, skinny seedpods.

Garlic mustard spreads by seed and can self-pollinate. It can produce up to 500 seeds per plant, and the seeds can survive in the soil for up to 7 years, making it hard to eliminate.

View Garlic Mustard Identification Sheet

Garlic Mustard Plant Closeup with small white flowers Grove of Garlic Mustard Plants in bloom with small white flowers

 Watch the Training Video

Submit A Volunteer Application

Submit Your Pulling Report


Park Location
Fox Brook Park
2925 N. Barker Road, Brookfield, WI 53045
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Fox River Park
W264 S4500 River Road, Waukesha, WI 53189
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Menomonee Park
W220 N7884 Town Line Road, Menomonee Falls, WI 53051
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Minooka Park
1927 E. Sunset Drive, Waukesha, WI 53186
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Mukwonago Park
S100W31900 County Hwy LO, Mukwonago, WI 53149
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Muskego Park
S83 W20370 Janesville Road, Muskego, WI 53150
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Naga-Waukee Park
651 Hwy 83, Hartland, WI 53029
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Nashotah Park
W330 N5113 County Rd C, Nashotah, WI 53058
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Retzer Nature Center
S14 W28167 Madison Street, Waukesha, WI 53188
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