The lower leaves are turning yellow either because: 1. they're not getting light, 2. The rest of the plant is sucking up nutrients (nitrogen) from them... but the rest of the plant looks very dark green, so I doubt it's a lack of nitrogen. I don't think they need to be fed yet.

If the new growth looks good, keep on doing what you're doing. Don't worry too much about the old stuff. Old leaves = old news

I really think it needs a re-pot, since they keep on drooping even though you water when they are dry. My plants always do the same thing as your's (even get some of that lower yellowing) when it's time to repot. Many variables go into determining the size of the pot, and sometimes roots just grow really fast. I wouldn't advise on a 5 gal just yet, maybe try a size in between.

As for the soil I'm using, it was some different kinds I mixed (not a good idea BTW) and it's not available anywhere else but Finland I think. I flushed with plain tap water 2 weeks before harvest at 3x the size of the container, and watered again once or twice afterwords with tap water also.

If you want my advice about soil, don't use it! I'm looking into coco for my next grow (whenever that'll be... moving to Amsterdam later this summer I hope). There are just so many advantages to using coco, only downsides that I've gathered is that it needs watering more frequently, and you need to be more accurate with ph and EC. However problems are a quick fix since you don't have to wait 4-7 days between waterings, and it's pretty difficult to overwater coco.
bigtopsfinn Reviewed by bigtopsfinn on . odd question... but I def need an answer haha ok.. so 3rd time grow... first time using FoxFarm soil and BB,TG,GB nute trio... and happy frog soil 400W HPS 4X4X6.5 tent... my question is--- I am having a lot of yellowing, dying, not growing at the bottoms of a few of my plants... since this is my first time using foxfarm ocean forest soil, it states on the bag no fertilization needed for 30 days... this would (in laymans terms) be my entire vegetative cycle... I have added some of the Big Bloom and started with Grow big as I Rating: 5