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BEST SELLING PRODUCTS
$29.49 – $74.96Price range: $29.49 through $74.96
HIGHLIGHTING the best of the best
SERVING The Greater Olney MD Area
PH: 301.450.SUST (7878)
livesust.com
The First in Maryland!
Green MowCo has expanded its service in Montgomery acquiring another local, all-electric mowing business, and has rebranded as Sust.
Sust is the first AGZA Certified Service Pro in the state of Maryland. Sust owner William Zimmerman is not only running an ultra low impact all electric landscape maintenance business, but is contributing to the outreach and education of our changing industry. William attended an AGZA workshop co-sponsored by NALP (National Association of Landscape Professionals) and Montgomery County. He was not only an attendee but was a featured guest speaker in front of an audience of nearly 100 grounds maintenance operators. William was able to speak to the locality of operations in the Montgomery County area and how his experience has been so far. AGZA would like to thank Sust for their participation and being a true example of responsible change.
With over a decades worth of industry experience, Sust has excellent customer reviews and prides itself on providing a reliable professional service to go along with their dedicated low impact approach to the business. AGZA encourages folks in Montgomery County to contact Sust if interested in quieter, lower impact land care and maintenance operations.
Currently servicing these zip codes: 20852, 20817, 20816, 20815, 20814, 20853, 20833, 20832


Copyright 2026 American Green Zone Alliance®, all rights reserved.
The American Green Zone Alliance (AGZA) is here to support Prologis vendors who have been contracted to maintain AGZA Green Zone Certified markets. Most of the support services are free of charge. If you need in-person support or wish to utilize our online course, there would be an extra charge.
— Education and training support is free of charge for Prologis vendors. —
• Education & Training Support For Managers and Frontline Workforce
• Information on funding programs/mechanisms that lower the cost of commercial electric equipment
AGZA online low-impact certificate primer course for Prologis vendors at a discounted rate.
AGZA in-person low-impact certificate training for Prologis vendors.










Principal CEO at Gardenland Power Equipment & Co-Founder and CEO of Towa Industries Inc.
Richard Ogawa, a seasoned serial entrepreneur with over 20 years of C-Suite and entrepreneurial expertise, is a market-leader in the OPE space. Growing up in his family’s Outdoor Power Equipment store, he fused his entrepreneurial drive with a commitment to empowering the industry with high-quality products, technology, and service. Under his tenure, Richard has grown Gardenland Power Equipment into a $13 million business as the #1 Rated Outdoor Power Equipment Retailer in Northern California.
Richard’s passion for innovation led him to co-found Towa Industries Inc., where he is pioneering transformative battery and power management technology, from on-site & mobile charging solutions to gas-to-battery conversion products, enabling landscapers to shift toward sustainable practices with battery-powered products.
Roger Phelps joined STIHL Inc. in 2001 and is currently the Corporate Communications Manager. In that position he is responsible for creating and telling the STIHL story through integrated event marketing, strategic partnerships, sponsorships, and digital and social media with the goal of increasing the visibility of and affinity for the STIHL brand and over 10,000 STIHL dealers. He attended the U.S. Naval Academy and served 10 years in the U.S. Navy attaining the rank of Lieutenant Commander. He has serves on the National Association of Landscape Professionals Foundation Board of Directors, the National Association of State Park Directors Leadership School Board of Regents, and the Professional Grounds Management Society Board of Directors.
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