"It's a great feeling, people know how long I've worked for it," Ngoy said. "I want to play more regularly with the first team, to score, make more assists. I'm sure I can achieve my goal."
The Belgian striker, who has five senior Premier League appearances to his name this season, scored in each of his Premier League 2 Division 2 outings for Stoke City, against Norwich City, Wolverhampton Wanderers and West Ham United during March.
"Julien's progressing really well," said Stoke's first-team manager Mark Hughes. "We're pleased with the progress he's made. Next year's a big year for him and if he continues in the same vein then he's got a great future."
The 19-year-old beat Swansea City's Oliver McBurnie and Reading midfielder Jordan Holsgrove to the monthly prize.
He was selected by a panel of the Premier League Football Development from a shortlist generated by a poll of all the PL2 managers, who nominated the best individual performance from their opponents throughout the month.
February Liam Walsh (Everton)
January Oliver McBurnie (Swansea City)
December Jonathan Leko (West Brom)
November Josh Sims (Southampton)
October Paolo Fernandes (Man City)
September Rushian Hepburn-Murphy (Aston Villa)
August Ethan Robson (Sunderland)