so here are a few leaves from a few plants in my hydro set up. it is 80 degrees and all plants are under a 400 w hps. i am at 1600 ppm with sensi bloom two part flowering nutrient and dr. hornbys big bud solution addative. about 2 weeks ago i was seeing nutrient problems in my leaves. i decided it was a deficiency so i moved to 1600 ppm, ( i was at 14) since then, things have only seemed to worsen. i have decided to flush, and have been for 4 days now. i am trying to decide which direction to go. if any additional info is needed feel free to ask, i just really NEED TO DIAGNOSE THE PROBLEM! after looking in the FAQ i am more confused and idk if i should have flushed or just assumed i was still having deficiencies and raise the ppm once again. i just dont see deficiency possible at this ppm. any response would be great!

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i forgot to add my ph is right at about 5.8 and most all leaves on the plants are curled in towards themselves and the plants main stem. the discoloration on the leaves is brown and sometimes blotches of white and brown or gray. PLEASE HELP!

so nobody has anything to say about my leaves. awesome. ill definitely help the next newbie that has problems. yea.

i have had a simaler problem, my leafs also curled & yellowed im finding that i need to flush the roots weekly to avoid nuit lock up. my first grow was bad that was before i was told ablut nuit lock up . i have about 1300 ppm in my tank. i was told that any thing over 200 ppm the plants will not take up any more nuits above 200 ppm. i have ben flushing every 2 nuit changes with clearex and ro water , untill i get a reading under 200 ppm . usualy goes down to 150. then drain & replace with nuits.first pix is first grow with out flushin untill 6th week.the second pix, of the litle ones i have been flushing every 2 changes, the last pix is what thay looked like last friday. hope this info helps. good luck

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High Grade Connoisseur

Dont be a douche, nobody is here at your beck and call. usual response times are counted in days, sometimes weeks. rarely hours. you don't need to get all pissy that nobody has solved YOUR problem for you 11 hours after your post.

aside from that, you have not provided enough info. We don't know how many weeks in bloom, and at what locations on the plants it is occurring (lower, mid, or upper leaves)

I would check out the pics at Grow Marijuana FAQ, Cannabis cultivation - marijuana growing tips & photos

it looks to me like like a K def, like figure 13 which progresses to look like figure 14 at the above link.

I would increase the amount of big bud you are using as it is around 4% K or find another additive that has higher K levels and augment with that. they really love their Potassium, and during bloom the flowers are eating it up at a very high rate, so the leaves show the signs.

in my opinion, people often misdiagnose the burnt leaf edge as an overfert prob when an overfert actually looks like figure 4 in the link above.

overfert is when the nute solution ppm is so high that water actually comes out of the plant roots and into your solution because of the osmotic pressure difference, it is more of an even crisping dehydration of the leaves from the tips, but affects the whole leaf, the entire surface, not just the margins (margin = blade edges)

if you have green and reasonably health centers on your blades, its not overfert yet imo.

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Motivation: Its not that I'm lazy, its that I just dont care.

My advice will save your plants... 1600PPM is WAY up there. Are these plants 4-6 ft tall and bushy as shit? probably not so that is too high.

I don't trust your water or mine lol, go find a place that sells R/O water or if you got a little money buy your own R/O system. For todays fix go get R/O water though asap.

Add your R/O water + no more than 25% of your nutrients recommended amounts from the label for your growth stage. I don't know how big your plants are but I noticed at 25% I still saw some nutrient burn on plants ranging in size from seedlings 2 leaves to my mother clone that is big and bushy. So please take that as a maximum at this point.

Next your air temperature and Ph are fine but are you cooling your reservoir at all? I toss bottles of ice in my reservoir 2-3 times a day depending on how cool the water seems to be.

Good luck, your biggest problem is hard water.

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This is all lies, conjecture, and fantasy....
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so im getting two responses, two very good ones, two different ones. the first saying that i have probably not burnt my plants and rather had a def. of a specific kind. others are saying that my ppm is too high. still slightly confused. i just do have to say that at 1600 ppm, how could my plants be having def.? the rest of the info is that im at 8 weeks flowering, and the stress is happening towards the top/ middle of the plant. thanks for all the feedback.

i could still use lots of help so its definitely welcome! i apologize for the hostility at the beginning, it just seems like some kid that has a 35 day old plant under a desk lamp that looks like a 2 day old plant of anyone of ours, he gets like 400 responses and i just want to harvest some good smoke!

It is because you dont have a deficiency. You have a late stage toxicity of potassium. So therefore the people suggesting you flush and lower your ppm is absoultely correct. It sounds like you are into the weeks of biting the bullet meaning flush appropriately like one of the people suggested with clearex ( i use that stuff ) and finish your cycle. Are you using a calibrated ppm meter by any chance?

nobody is answering you either because they havent seen the thread or they just dont know what is wrong.....flush your plant with some good water....it will not look better but will stop getting worse. you are having a lockout due to minerals and shit being in your water.

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I don't grow..I just lieCheck my journal
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