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Earth Month in Rockville

Earth Day is Monday, April 22, but Rockville and Montgomery County celebrate throughout spring with the following events:

Saturday, March 23: Earth Hour

Earth Hour encourages people to turn off all nonessential lights in their homes and businesses for one hour, from 8:30-9:30 p.m. Saturday, March 23, and do something positive for the planet. Learn more and find ways to participate in Earth Hour every day at

Monday, April 1: Solar Co-op Registration Opens

Residents interested in installing rooftop solar are invited to join Capital Area Solar Switch for education and discounts. For information and updates, visit

Saturday, April 6 and Sunday, April 7: Annual Potomac River Watershed Cleanups

City staff will greet volunteers. Gloves and bags will be provided. Student Service Learning hours are available. Children under 14 must be accompanied by an adult. Bring water and wear sturdy shoes. Space is limited. Registration required at Stream cleanup sites include:

  • April 6: Croydon Creek Nature Center, 852 Avery Road, 9:30 a.m.-noon; and Maryvale Park, 812 First St., 10 a.m.-noon.
  • April 7: Northeast Park, Gude Drive and Redgate Farms Court, 10 a.m.-noon.
Saturday, April 13: Twinbrook Stream Cleanup

9:30-11 a.m. at the Twinbrook Community Recreation Center, 12920 Twinbrook Parkway. Student Service Learning hours are available. Children under 14 must be accompanied by an adult. Space is limited. Registration required at

Monday, April 15-Tuesday, April 16: Montgomery County Energy Summit

Silver Spring. This year’s summit will focus on preparing the commercial building community for compliance with energy benchmarking, building energy performance standards and emerging building codes. The summit will provide education sessions, hands-on questions and answers and support, an “innovation alley” showcasing products and services, and a networking reception. Learn more at

Saturday, April 20: Croydon Creek Campfire

7:30-8:30 p.m. at Croydon Creek Nature Center, 852 Avery Road. Gather around the campfire with friends for stories, snacks and more. An adult must accompany children and all participants must register. Ages 5 and older. Register for course #31322 at

Sunday, April 21: Science Day

Noon-5 p.m. at Montgomery College, Rockville campus, 51 Mannakee St. Explore rockets, robots, chemistry, reptiles and more at this annual Rockville tradition!

Monday, April 22: Earth Day Weed Warrior Event | CANCELED, See below for related events.

This event has been canceled, but there are other opportunities to participate in Weed Warrior events at 9:30-11:30 a.m. at Dawson Farm Park, 312 Ritchie Parkway. Join a Rockville Weed Warrior leader for a non-native, invasive plant removal workday. SSL hours available. Space is limited and registration is required. Register and find more workdays at

Saturday, April 27: City Nature Challenge

9-10 a.m. at Croydon Creek Nature Center, 852 Avery Road. An annual worldwide event that encourages people in cities to get outside and observe nature in their community. Download the iNaturalist app from your app store before attending the event. Naturalists will teach you how to use the app and lead an excursion in the forest preserve to make observations of wildlife big and small. All children must be accompanied by an adult. Ages 6 and older. Register for course #31323 at

Saturday, April 27: GreenFest 2024

 11 a.m.-4 p.m. Blackrock Center for the Arts, Germantown. People of all ages come celebrate, learn and start or continue their journey to improving our community and the environment. Learn more at

Saturday, May 4: Native Plant Sale

9-11 a.m. at Elwood Smith Community Center, 601 Harrington Road, Rockville, MD 20852.

Sunday, May 5: Invasive Species Pull

1:30-3:30 p.m. at Croydon Creek Nature CenterHelp remove invasive plant species and improve the Hayes Forest Preserve. SSL hours available. Register for course # 31325 at

Saturday, May 18: Spring Festival and Kids to Parks Day

10 a.m.-12 p.m. at Croydon Creek Nature Center852 Avery Road. Bring the whole family to celebrate Kids to Parks Day with Croydon Creek! Enjoy nature games and crafts, woodland hikes, live animal meet and greets, sustainability exhibits, local vendors, and more.

Find More Spring Activities at Croydon Creek Nature Center

Looking for more to do outside? Croydon Creek Nature Center offers hikes, campfires, nature outings, youth camps and more throughout the year. Learn more and register at


Groups can adopt a Rockville stream and host cleanups to help keep litter out of local waterways. Apply at

Solar and EV Charger Co-op Coming Soon

If you are interested in rooftop solar, or are looking to install an electric vehicle charger, then this is the opportunity for you. For updates, sign up for the “Environment and Sustainability” email newsletter (see below) or visit

Weed Warrior Workdays

Join Rockville Weed Warrior Leaders for non-native, invasive plant removal workdays. SSL hours available. Space is limited. Find upcoming events and register at

Plog Rockville

Pledge to clean up litter while you walk, jog or run through Rockville and receive a free plogging bag while supplies last. For more details and to take the pledge, visit

‘Environment and Sustainability News’ Email Newsletter
Don’t forget to sign up for seasonal email newsletter updates on environmental events, volunteer opportunities and climate action news throughout the year. Visit and select “Environment and Sustainability.”

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Rockville Reports is the official publication of the City of Rockville, published at City Hall, 111 Maryland Ave., Rockville, MD 20850-2364.