Please help!!!

Ok, so to start off with I am pretty much a nub at this. I have a plant that my buddy was gonna clone and never did. He had this plant in veg for like 5 months under a 4ft 4 bay t5. Well I decide to take the plant and to flower it because it wasn't getting near enough light and was very big. So I get it to my room and put it under a 600 watt HPS and it takes to flowering wonderfully. Now I am three weeks into flowering and all kinds of leaves are dying. The buds are growing great and getting very sugary but just random leaves are completely dying off. It's mainly all small leaves at the bottom with little light but resently has started to move up the plant slowly. It is in a 15g pot with ffof. I use all of the ff nutes except the microbrew and the kangaroots strictly to there schedule and recently started molasses. The leaves dying off early in flower looked like phosphorus def that has slowed down a little now a bunch of leaves toward the top of the plant are starting to look spotty(see pics). I'm not sure what is goin on with it just know that I probably need to get on top of it before it gets too bad. Any advise is appreciated and if anyone needs more info on it I would be happy to give it. Thank you too all that apply your help is much needed.

Calcium and magnesium are needed. Possibly phosphorous as well. Got micronutrients available?

I do have some Epsom salt for plants but that is it. I did add a little bit extra of the beastie blooms for phosphorus. Do you think it will help or hurt.

120 views and one comment. Come on peeps really???

What are your temp highs and lows? Photo #4 kinda looks temperature related.

Look for spidermites under the leaves. The one pic looks like light burn.

I don't understand what the problem is.
I think they look good for what light you say is on them. I would count branches up 4 from the bottom of each plant and chop them off. You wont have enough light to penetrate down that far. You'll get a bunch of little popcorn nugs that are a pain in the ass, like not worth it, to trim. Plant looks pretty healthy to me,

Temp ranges from 70-80 with RH 40-50%. I will be checking for those mites! Thank you too all that have tooken time to reply!!

There is only 1 plant there. I did cut all the little bitty branchs off the bottom. It is bare branch prob 18" up the plant. I know I do need more light for sure but the 600 watt is all I have right now. Is it safe to go ahead and cut all the other lil bs this late in flowering?

You can but I leave it and make hash with it.

Yeah that's what I was planning thanks for all of the help everyone.