The 19 year old said he gave it his all against Welshman Sammy Lee but it wasn't enough to win gold.
"I knew it was going to be tough - he's a very good opponent," he said.
"He won gold last year at Youth Commonwealth (games) - I won bronze but never faced him. Awesome experience man - I'm still young, still hungry, I'll come back stronger."
Ato Plodzicki-Faoagali said his chances in the final weren't helped when he was deducted points for holding his opponent but said he will learn from his Commonwealth Games experience.
"It was a great campaign. I had four tough fights: all respect to all my opponents that I fought, even today," he said.
"I'm just taking everything in because I'm still young. It's an amazing experience even just to get silver. It would have been nice to get gold but it is what it is."
With no athletes in medals contention on Sunday, Team Samoa will finish the Commonwealth Games as the top ranked team in the Pacific, with two gold and three silver medals.