Alliance Stone and Modern Builders Supply have joined SiteOne Landscape Supply.

Alliance Stone serves the greater Atlanta, Ga., market from a single location. Modern Builders serves the San Diego, Southern Orange County and Inland Empire markets in California with two locations.

“Alliance Stone is a terrific addition to SiteOne with a dedicated stone center and strong hardscapes and natural stone expertise to complement our current team and existing full line of products in the Atlanta, Ga., market,” said Doug Black, chairman and CEO of SiteOne Landscape Supply. “Alliance Stone has a rich history and talented associates who share our passion to provide quality products, service and value to our customers. We are committed to delivering the best customer experience in the green industry and the combination of Alliance Stone and SiteOne is yet another step closer to achieving our goal,” ”

The acquisition of Modern Builders marks SiteOne’s sixth addition this year, Black said.

“Modern Builders is a true market leader and a great fit with SiteOne as they expand and extend our existing hardscapes presence in southern California. This addition moves us strongly forward on our mission to be the best full-line distributor to landscape professionals in all major U.S. and Canadian markets,” Black said. “Modern Builders has a passionate and talented team focused on providing excellent quality, service and value to their customers, and we are excited to have them as part of our family.”

SiteOne previously added The Garden Dept., a distributor of nursery and landscape supplies to landscape professionals in the greater Long Island, N.Y.

“We continue to expand into new markets and increase the number of markets where we provide a full range of landscape supplies and services to our customers,” Black said.