Overseas stars including Australia's white-ball captain and all-rounder Abhishek Sharma.
Garg attempted a horrific scoop shot on his IPL debut only for the ball to hit his helmet grill and land on the stumps as he was bowled for 12.
But Warner advised the youngsters to carry on playing their natural game.
"Exciting times for Indian cricket and I can't wait to see what the young players produce," Warner said after his team's loss.
"There were three bizarre dismissals, but I encourage them to keep playing the way, not think too much about it. We will rely on our senior players to guide those guys in the middle.
"Play your natural game and the that's the only way you can learn."
Teenage leg-spinner Ravi Bishnoi also had a good outing with Kings XI Punjab on Sunday when he returned impressive figures of 1-22 from his four overs.
Kings XI lost the game to the Delhi Capitals in a super over but Bishnoi's exploits with the ball earned him rich praise from pundits including former Indian captain Sunil Gavaskar.