Right need some help on legs, i've recently started back doing them since january ritulary and havent missed a session yet, never used to trian them like i have this year and really enjoying look forward to legs day more and more, then only problem is that the weight i can squat(90kg for 3 up to 130kg for 10) etc has gone up but my legs seemed to have stayed the same, my diet is fine as my weight and overall shape is increasing and getting better my inner chest prob seems to be getting better aswell.
Does anyone have any ideas on how to get them to grow, i have changed my routine once this year to avoid them getting used the same routine.

my current routine is as follows:-
squats 2 x warm up
4/5 x 8-10

press - 4 x 8-10

front squat - 3 x 10

extensions -1 x 6
1 x 8
1 x 15

curls - 1 x 6
1 x 8
1 x 15

any help or change of routine would be greatly appreciated.