The 21-year-old left-back has enjoyed a successful five-month stint with The Boro, where he has made 25 appearance and scored three times.BCFC
The 21-year-old left-back has enjoyed a successful five-month stint with The Boro, where he has made 25 appearance and scored three times.
Stevenage who are managed by Tunisian Dino Maamria are currently in 10th spot.
Seddon has yet to make his senior bow for Blues but has been included in the First Team squad on several occasions.
He was one of the most consistent performers for Blues Under-23s last season, as he notched up 30 appearances and scored three goals.
His current Blues deal runs until 30 June 2019, with a further one-year option clause included in the Club's favour.
"We think quite highly of Steve and think he has got a big potential," said Blues boss Garry Monk.
"We wanted to give him as much experience as possible this season, to test himself playing week in and week out.
"That’s the biggest progression you have as a player like Steve at his age.
"He has done fantastically. When he comes back, he will go back out on loan again.
"What’s most important this season is he goes out, competes and gets experience under his belt and when he comes back for next pre-season is to compete with the First Team.
"I have got a lot of belief in Steve, I think he has got the potential to be a good player."