Growth spurts can happen at any time. I became taller than my parents fairly early, by about 13. But everyone is different. You'll just have to wait and see what happens. Don't stress it brah.
Experience it for yourself. I always do cardio pre/post gym... As in, I run 15 mins there and back, haha.. As long as the cardio isn't taxing your body more than the weight training you should be...