<p>My S was your height at 17, and now at 20 he’s 6’ tall. He never had a growth spurt either; instead, he grew slowly and gradually (he was only 5’ tall in 8th grade), and it’s only in the last year that he seems to have stopped, and not coincidentally also has to shave every day. </p>
<p>You may or may not keep growing, but 5’9" is a fine height!</p>