Waukesha County


Garlic Mustard Plant Closeup with small white flowers

Help Control Garlic Mustard with Waukesha County Parks

Volunteer for self-led garlic mustard removal in our parks in the spring and summer (view locations).

Open to volunteers of various ages, skills, and abilities. For volunteers under the age of 18, adult supervision is required during all work. Dress for weather conditions: Wear boots and bring your own work gloves. 

Note: Parks annual membership or daily permit not required for participant vehicle on workday(s).

 Get Started: Garlic Mustard Removal (self-guided)

What's next: We'll review your info and contact you with further instructions (ie. video, map, and work report form).

Learn to Identify Garlic Mustard
Grove of Garlic Mustard Plants in bloom with small white flowers

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

 Watch the Training Video

Get Started: Complete Volunteer Application

Record Results: Submit Your Pulling Report

Park Locations - Garlic Mustard Removal

Fox Brook Park
2925 N. Barker Road, Brookfield 53045 (directions
Fox River Park
W264 S4500 River Road, Waukesha 53189 (directions)
Menomonee Park
W220 N7884 Town Line Road, Menomonee Falls 53051 (directions)

Minooka Park
1927 E. Sunset Drive, Waukesha 53186 (directions)

Mukwonago Park
S100W31900 County Hwy LO, Mukwonago 53149 (directions)

Muskego Park
S83 W20370 Janesville Road, Muskego 53150 (directions)

Naga-Waukee Park
651 Hwy 83, Hartland 53029 (directions)

Nashotah Park
W330 N5113 County Rd C, Nashotah 53058 (directions)

Retzer Nature Center
S14 W28167 Madison Street, Waukesha 53188 (directions)


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Park Hours Sunrise to 10 pm • 365 days a year

Waukesha County Park System
515 W. Moreland Blvd • AC 230
Waukesha WI 53188 (map)

Hours M-F • 8 am - 4:30 pm* (closed holidays)
Visit us in person in room AC 260
*Rentals: in-person support 8 am - 4 pm
Contact us 262-548-7801 | ParksInfo@WaukeshaCounty.gov

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