I wouldn't worry much about the smell. Some plants don't get real fragrant until like week 4-5 in to flower so hang in there as long as they look healthy. I've only grown from seed few times so I'm not the best to answer the question on the length for sex to show. From my experience my ladies usually show their hairs in a week to 2 weeks. If you know what a female looks like you'll have no trouble picking out the males if there are any. I do know that you should check several times a day because those pesky males will develop those sacks and blow their loads all over your ladies within a day of growing the pollen sacks. lol. so be diligent. that fan will make sure the pollen gets dispersed throughout the garden too so that's another reason to check frequently. The fan is great at all times as long as it osculates. Good luck my friend and I hope this helps. Keep us updated!