Plants burning??? please help!!

hello everyone i've been to countless sites, still a newbie at growing and i just CAN'T find anything on this that's in stone, so here it goes:
I'm growing a few different strains and these problems are happening throughout a few plants here and there, they're in about their 6th week of veg. and i'm using fox farm ocean forest, temps get around 82 average and sometimes reach 90 if i close the outer room on them. Lamps are about 18 inches away and they're 600 watt hps. I also use about 2 gallons or so of water to feed them, and i'm also using iguana juice grow as nutes, Recommended dose is about 4ml per liter so basically bout 14 ml per gallon i ONLY using about 10ml for 2 gallons (bout 5ml per gallon). PH is always around 5.9 to 6.3, with or without nutes. What do you see wrong??? By the way the light you see them under is just for clones and i put them there for picture purposes. The bushy one is Jack Herrer and the other is SLH, also the slh has some small leaves any info on that??? Any help would be great, OH also do LST with my plants, except for that slh which i topped.

Im just a newbie, but I have read something about PPM. tap water has high ppm and if you add nutrients it goes even higher and plant cant absorb nutrients. I guess ppm means parts per million !? Correct me if Im wrong, its just what I remember from surfing around in this forum.

Check the lowest and oldest leaves on the plant, like the pod leaves and first single-bladed leaves. If it's nutrient burn, they should already be burnt to a crisp.

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hey Jerry

"i'm using fox farm ocean forest - i'm also using iguana juice grow as nutes"

When using pre fertilized soil mixtures you have to use clear water, especially with seedlings.

Flush with 3X the volume of your pots with 6.5 PH adjusted water, or distilled water (7.0 PH). The burnt leaves will be lost but they are low on the plant so don't worry about them. Flush right away.

Check out the plant problems chapter in my ebook: Weed Science - free ebook download

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Look like a PH problem you should check your run off the next time you feed. It's not nutrient burn. If the PH is wrong the plants won't absorb the nutes thus yellowing leaves like you have

my good buddy hobbes is correct, you have nutrient burn there my friend, you need to do a nice flush and cut back on those nutes, they are lookin nice and shouldnt be to stunted or in bad shape, they will recover fast, but remember, those leaves that are damaged will never fix themselves, it doesnt mean they are dead tho so dont go rippin the plant apart she will be fine, give it a nice 3-5 day flush and then start with the nutes again at half or a quarter what u were giving, you ca nalmost tell how much girls need man, if they grow nice and vigorous with jsut little burn tips thats what ur lookin for, if they dont grow much or at all in like 2 days then u know u aint givin enough nitrogen, youll even see em start to turn a slight yellow color, hope this helps guy,






ps that one pic i think its the third almost looks like that leaf went nitrogen deficient, am i overlooking hobbes or do u see what i mean?....pics 1 2 are def burn but then theres a few that look almost n deficient, it may be the lockout from the high feeding i dont know, do u let the nutes directly touch either when mixing? make sure they never touch nutrient on nutrient, they neeed to be mixed in the water ya know, also good rull of thumb if your using three part series, mix micro first, then grow, then bloom if in veg and micro, bloom, and grow if in flower, also start cutting back nitrogen intake after about 2 and a half weeks of flower, but u need to be careful because early in flower they desperatley NEED N to stretch their pretty little legs and get ready to explode for you, i hope i helped u bro

no, you're right tap does have high minerals, and its ph is bout 7.5 or so here. But that's fixed my ppm for minerals and other things is around 140 or so which is right around optimal if i remember correctly. I don't think that's it. but you are right.

thanks ! and i will check out the ebook

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it may be the lockout from the high feeding i dont know, do u let the nutes directly touch either when mixing? make sure they never touch nutrient on nutrient, they neeed to be mixed in the water ya know[/QUOTE]

Thanks Aknight3 i'm gonna flush them for a few days and see what happens, i guess ocean forest is notorious for carrying nitrogen and other nutes, BUT see my problem??? lol it seems like they're getting nute burn but when i lay off the nutes they start yellowing "nicely" at the bottom like N deficiency??? doesn't make sense but I'll take your guys' word for it and flush for a few days...also is that possible to get a nutrient lock from over feeding????