it is my first grow,i have a perfect grow room but still have to buy a filter ,i need to know if i can buy it the last 4 weeks of flowering because these filters are expensive and i cant buy it now.the smell now is normal
Depends on how many plants you have and what strain it is.
I grew a 14 inch lowryder ak47 that I could smell to the front door of my apartment when it was sitting in my room, under a desk and in a pc case. Now I'm using odor eliminating bulbs and activated carbon with glade air fresheners on each side of my room. The smell should be normal up till a week before flowering.