northern shouldn't even be noticeable until you grind it up...but that's only if it's extremely happy during the grow...light sweet and aromatic
when it's ill tempered/unhappy it smells like a skunk....sickly..sweet..musky...
yeah....maybe you should invest in odor control...better safe than sorry
I ordered Ona Block Fresh Linen Scent and I cannot smell my 3 girls at all, smells great in my apt. too. For about $8 I think this has got to be the best odor control for small grows.
If you are concerned with odor a carbon filter is your cheapest and best bet. Ona will just give you pot/ona scented air with any flowering plants. There are plenty of tutorials on how to build yourself a cheap carbon scrubber.