Hi, Been some years since I last grow and then just two times. Now I think the flowering is going very slow and am worried I will only get small popcorn buds. I see changes every day, but minor. How long is this flowering phase and should I be worried? Strain Gorilla glue fem auto. Brand Nordic seeds. Grow medium aeroponics, 600w hps. Ph in range 5,6-6.2 and temps are good in water and air. Have airflow with fan. Some tops are burned due to being close to the lamp.