Both players were forced out of the Canaries' 1-0 victory at Carrow Road on Saturday with respective second-half knee injuries, but the side held on to pick up three vital points which moved them out of the relegation places and into 14th spot.
It is the latest problem for Hughton, who confirmed that defender Russell Martin was 'not close' for a first-team return against the Potters after he failed a fitness test on Friday following the back injury suffered against Aston Villa.
However, Steven Whittaker enjoyed an impressive Premier League debut as he played the full 90 minutes following his long-term ankle ligament problem, while Hughton does not believe Turner and Garrido will be absent for a significant period of time.
He told the Pink 'un: "I know they are not serious ones, but still enough for them not to finish the game.
"We will assess them and take it from there. I have a feeling Javi's is not too bad because he was carrying it for a little while and Michael too.
"Michael has been doing so well for us and he is a big one physically as well. We needed him there, particularly up against [Peter] Crouch and the set plays. To change it was a blow."