GMSgrowsanswered grow question 4 years ago Week 1 from the start of seedling 400 ppm 0.4 ec second increase 100 ppm 0.2 ec every week if you see good growth. When you reach 800 ppm 1.6 ec is where I stop until flower time., unless the girls tell me they need more. 5.5 to 6.0 ph for veg cycle and 6.0 to 6.5 for flower cycle. Mist for 15 seconds about every 5 to 10 minutes. Any quality ferts can be used, but I recommend clear nutes as to not stain the roots and make you think something's wrong, when there isn't. Cheers