RE: Best sets/reps for squats?
For what it's worth, your routine minus the Calf Raises is exactly what I've been doing recently, but with different sets/reps, so it gets my seal of approval. As a lower body routine that's a very good balance. How long have you been doing it for though?
With any routine, continued linear progression, i.e. consistently adding weight to the bar, will diminish after a period of time. To overcome this adjusting sets/reps/exercises/grip/foot position, etc can lead to further gains.
Squats can be changed to Front Squats.
SLDL can be changed to single-leg SLDL with dumbbells
Lunges can be changed to Reverse Lunges, Clock Lunges (both with dumbbells) or Split Squats (dumbbells or Smith Machine)
Calf Raises can be changed to Seated Calf Raises - either in the Smith Machine or with a dummbell on each knee, providing it's heavy enough.
Reps can be increased to anything up to 20 reps for Squats and Calf Raises, and 10-15 reps for SLDL and Lunges.
And if available, you could always cycle in Leg Pressing instead of Squatting if there's sufficient weight available.
With good form, incorporating progressive overload, and sufficient calories, then YES, this will be enough to make them grow.