Yep - so far, every strain I've grown has begun to give off that smell around three weeks of age. The stronger it is now, the stronger it'll be in flower.
Ah sweet thats good to know, Thats me just hit week 4. Is there any limit as to how long to veg for? As far as I know from what I have read it is all about space restrictions and I still have a good 4 feet left to play with.
Here is a couple of updated pics, as you can see I have added some mylar to the top of the nft tank as I noticed when I did my nutrient change that there was some green growth where the other holes are and I thought by covering it with mylar this would stop this.
I also noticed a couple of leaves where struggling to get light as the other leaves where blocking them and they had wilted somewhat. So the mylar at the bottom should hopefully reflect some light upwards and resolve this issue and so far so good. The leaves that were wilted have perked up and I have also turned the tank round so the plant is getting light slightly differently.
What do you think so far? Seems to be lots of new growth and it has bushed up somewhat too.
Would it be wise to trim some of the leaves that are blocking the light from the lower leaves? at the moment I just tucked them down under the other leaves but I reckon they will just pop back up again.
Oh yeah I also added a circular air stone to the nutrient tank to add some more oxygen to the nutrient solution, don't know if this will make much of a difference but I thought it was worth a try.