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Weed Warriors at work. Certified Weed Warriors


The Department of Parks has trained more than 800 citizen volunteers to be Certified Weed Warriors. These energetic volunteers assist park staff on a regular basis in monitoring and removing non-native invasive plant species (NNIs) from parkland.

To become a Certified Weed Warrior, you must participate in a 2-hour field training class with a forest ecologist, complete a 2-part online course, and participate in a supervised workday with park staff. The training emphasizes invasive plant identification, removal and control techniques, and working safely in the woods. Weed Warriors are then authorized to work on M-NCPPC parklands on their own schedules and at their own pace.

Who are Certified Weed Warriors?

Many Certified Weed Warriors live near one of our parks and do their volunteer work on a casual schedule. Others develop specific work programs, taking time each week or two to remove invasive plants—sometimes in the company of another Weed Warrior. Others choose to work with larger groups, such as those organized by community groups with permission from the parks department. Whether you work individually or with a group, you will contribute to the control of non-native invasive vegetation throughout the approximately 35,000 acres of county parkland.

If you are interested, and want to take the next step to becoming a Certified Weed Warrior you must register for one of the field training sessions listed below.  Volunteers at the 2009 Garlic Mustard Challenge

Certified Weed Warrior Training

Certified Weed Warrior training occurs April through October and includes a 2-hour field training class with our forest ecologist, a 2-part online course and a supervised workday. After you register for the field training class, you will be given information needed to access the online training modules and to register for a workday.

Field Training Classes

Certified Weed Warrior field training classes run from April through October. The training sessions are open to anyone who would like to learn more about non-native invasive plants. This training complements the online training modules and is geared toward those who intend to become Certified Weed Warrior volunteers. Topics covered during field training sessions include:

  • Identification of non-native invasive plants found in park natural areas
  • Removal and control techniques suitable for park lands
  • How to stay safe in the woods
  • Procedures for becoming a Weed Warrior
  • Weed Warrior responsibilities & allowed activities
Training Dates

Trainings are two hours long and will begin in April, and are held approximately once a month through October. You must register on-line using our volunteer management system. For any additional information please contact our Volunteer Coordinator.

WEDNESDAY| September 18, 2013 | FREE | 3:30pm - 5:30 pm (scroll to the "Weed Warrior Training" opportunity at the end)

MONDAY | October 21 , 2013 | FREE | 3:30pm - 5:30 pm (scroll to the "Weed Warrior Training" opportunity at the end)

Unless other noted, field training classes are held from 3:30 p.m. – 5:30 p.m. near Meadowside Nature Center in Rock Creek Regional Park. NOTE: You must be at least 16 years old on the day of the field training to become a Certified Weed Warrior.


Please register through our online volunteer registration system. Once you register for a field training date, you will be contacted by our Volunteer Coordinator by email. You will be given further instructions once you are registered.  

Registration for a field training class is required to be able to access to the online training modules. Classes are limited to 18, so we need to know in advance if you plan to attend and how to contact you in case training is cancelled. If you have any questions about the registration process, please contact our Volunteer Coordinator.

Contact Us

Please email our Volunteer Coordinator for more information and to register for training at:

back to top - Last update: September 11, 2013