The two combined for five of Minnesota's nine hits in its 3-2 loss to Seattle on Saturday, and have been providing strong defense with Florimon at shortstop and Carson in right field.
"We'll kind of get a feel for them as we go along, but both of them have been impressive, to say the least," Gardenhire said. "They both have stepped right in, and I'm really not worried about them."
Florimon, who had his contract purchased on Tuesday, has looked smooth at shortstop and picked up his first hit with the Twins on a triple on Saturday.
"He's pretty confident," Gardenhire said. "He kind of quiets the whole position down out there. He's in control and has a good feel for the game. He's made some nice plays over his head. At the plate, I think you saw right-handed, which is pronounced as his best side, you saw him pretty aggressive with a better swing."
Carson, meanwhile, had a career-high three hits on Saturday, and also threw out a runner trying to advance from first to third on a single to right. He joined the Twins on Friday after leading Triple-A Rochester in both games played and RBIs.
"I like what I've seen and like what he can do," Gardenhire said. "We know he's a good defender. You saw him throw a guy out at third base with a pellet. He moves around smooth out there, and offensively, he's taken some swings."