The former Everton centre-forward has rediscovered his goalscoring touch in recent weeks.
Asked about Calvert-Lewin's prospects of an England recall, Farke declared: "Not a topic for me, that is a question for Thomas (Tuchel, England coach).
"If he wants to ask me, I will give him my honest opinion and what I think about Dominic.
"You all know how much I trust him and how much I value him. He has done it before, 11 caps for England, and his goal record is good.
"For him, it is just important he stays fit, confident and in a good rhythm, and it will take care of itself.
"It always depends on how you deliver, and I think it's important for a player, a few good weeks is not enough or what he is capable of.
"He has proven in the past, but if he can prove this during the season over more weeks, there is no limit."