Ferguson, still a teenager, signed at the beginning of this week, and Hodgson described him as "very talented."
"We’ve been talking for a long time now about making certain we bring younger players into the club," the manager said.
"The age of the squad has been a constant topic of discussion, and we’re aware of it. It’s been more of a subject of awareness in this period of three games a week so there’s no doubt we want to... rejuvenate the squad.
"That’s been our aim all along. Our first signing has been a clear mark of that intention, because the signing we’ve made is a very talented 19-year-old."