Hartson thinks that the Welsh international is not currently showing the form he was before his injury at Stoke City, and thinks that a consistent run of games will help him get back to those heights.
"I just think Aaron needs that run of games, maybe if he did go out on loan he'd get that," Hartson told Sky Sports.
"He doesn't seem to start many games at Arsenal now and when he does start he's brought off and he doesn't look happy. I just don't think he's quite hit the heights in terms of where he was before he got injured but he will, I'm sure he will."
Ramsey has made just 12 starts for the Gunners this season.