While the 19-year-old found the step up to the Premier League with Fulham more challenging last season, Pochettino is confident he will enjoy success at Tottenham, but called for patience.
He said: "You can be a very good player, but you need a platform, team-mates and good coaching staff to help you. Then you need time and luck and training hard and hard work.
"Sometimes the people don't realise that for a player with talent to have a good career and be successful you need a platform. Tottenham, I hope, will provide that platform.
He added: "From the Championship with Fulham to Tottenham in the Champions League is going to be completely different.
"The good thing is that he has the capacity to play in different positions. That's an interesting quality and maybe he can play in different positions for us. It will be very helpful."