Substitutes Tom Cleverley (18) and Fraizer Campbell both found the target in the 4-0 victory against Kaizer Chiefs.
Ferguson, who used the final to blood teenagers Craig Cathcart and Rodrigo Possebon, was delighted with the way they responded.
He said: "They are all at a good age in terms of us judging them and most have been out on loan.
"Jonny Evans had a good spell at Sunderland and was instrumental in them staying up. Fraizer Campbell was instrumental in bringing Hull up.
"Lee Martin was unfortunate with injuries but he showed what he can do by setting up the first goal here. He has potential.
"Craig Cathcart is looking much stronger after injury and the intention is to put him on loan this season.
"Possebon will stay as he has potential for first-team football while Cleverley is just a young lad and has time on his side. All the young players have good potential."
Ferguson added: "The Chiefs were tired in the second half after playing on Thursday. They spent a lot of energy in the match. That took its toll on them.
"But in the first half they had their moments and we managed to scramble through that.
"We got the goal just before half-time and it was not really deserved. But once we got in front we had no problems after that. We kept the ball well and are delighted with the result."
