They can surround their creation with a maintenance-free fence, and protect the whole thing with smoke alarms, fire extinguishers and security systems.
Held in the former Lowe's building at Franklin Center on U.S. 30 east of Chambersburg, the 21st annual show attracted more than 4,000 people on Friday, according to Jackie Martin, president of the Franklin County Builders Association.
About 160 vendors set up shop, she said.
"It's our first year in this building, and it's working out well," Martin said. "We have 50,000 square feet, with wide-open aisles. We've had a great response. The traffic is phenomenal."
Martin said her company, Martin's Refrigeration of Fayetteville, Pa., gets "a good bit of business" from the show.
Scott Rosenbaum, president of Rosenbaum's Landscaping and Nursery, had a crowd-stopping indoor display of a stone patio complete with fountains and azaleas, tulips, hyacinths, daffodils, and other plantings. He said it takes "two days to put it in, and three-fourths of a day to rip it out."
"Our forte is design," he said. "We do a lot of water features, and we don't duplicate any."
In business for 23 years, Rosenbaum said he's been at the show for eight or nine years.