Quote Originally Posted by MRDiff
Not to disagree with either of the two comments, but if using MG, I dont recommend using nutes for quite some time. Its a mistake I made and even now, they still have signs of nute burn. And if you do, definitely go 1/4-1/2 strength.
As far as lighting, I have 4 80w 5600k, and 4 43w 2100k bulbs. I have about 6 plants and hope to fower half of them after weeding out the males. So your 100w bulbs should do fine.
Well that all depends, I grew in MG soil and used MG ferts and had no problem really at all. And I was giving them ferts about 3 weeks after they popped out the soil. It's all really on your strain. Some tolerate ferts better than others. Sparingly is the keyword here though. Like these BB I'm growing at this moment. I haven't had to give them fertilizer at all. I tried to one time to see what it would do and it gave me a slight burn, so I haven't given any yet and it's going on 2 months that I had these suckers, from seedlings. Yes, if you do burn them though, don't expect after a good flush that burn look is going to disappear. It won't get any worse, but it won't get any better.