Crispy, golden brown leaftips and no smell, help!

[athirdpath]

Strain - Sativa/Indica Cheese, Sativa Grapefruit Diesel, Indica Purple Kush
# of Plants - 2 Each
Grow Type - Hydro
Grow Stage - Flower, 8 weeks
Setup - Hand water from gallon jugs
Light - 600 Watt HPS
Nutrients - General Hydronponics Flora Nova, Calmag, Koolbloom, Sweet
Medium - Cocogrow coir fiber
PPM - Unknown, following genhydro schedule
PH - 5.8, recently changed to 5.5 to try to fix problem
RH - 40% to 55%
Room Temperature - 78 to 88
Solution Temperature -70 to 75
Room Square Footage - 27
Pests - None Known

Hey, nice to meet you. I'm a new first time grower and I'm having a problem in late bud. The leaves are turning a into crispy golden-brown mess, with the tips starting first and curling under, then the margins. The Cheese unfortunately have got it the worst and they are the largest.

I've been pruning them as they get bad, so I don't know if it will kill the whole leaf or not. It's the first problem I've had, but thanks to the dead reckoner here I suspect it might be K or Manganese.

I mix 12 one gallon jugs and hand water with a measuring cup twice to three times a day, until water barely seeps from the drain holes. I lowered the ph from 5.8-6.0 to 5.5 to avoid K lock, and I removed the dry Koolbloom and raised the lights to reduce stress. The leaves feel dry, and the crystals on the leaves seem to have fallen off. The buds seem stunted and don't reek like they used to. I've put many hours into this and I don't want to see my babies turn to ragweed!

 

[HazeSeeker]

Im not a hydro man , but something might help you ...check out my blog entry ...
You'll get some help around here ...

 

[Hogdady]

Better hope you don't have what I have! Already destroyed one crop and workin on killin more. If your crystals are gone and the hairs are turnin brown you better jerk it before the whole thing drys up! I still dont know whats goin on with mine, but I have seen several posts with pics that look very similar. One question; if you look closely at the leaves, are there small yellow dots along the vein lines? Here is a pic of what I mean....

and what happens later...

good luck dude

 

[PHATBLUNT420]

looks like both a phosphorus and potassium deficiency ... if your feeding it normally its probably due to Ph troubles, and like you have ruined 2 of my crops also

without a doubt everyone growing ganja needs to invest in some dolomitic lime
especially with FFOF

 

[Hogdady]

looks like both a phosphorus and potassium deficiency ... if your feeding it normally its probably due to Ph troubles, and like you have ruined 2 of my crops also

without a doubt everyone growing ganja needs to invest in some dolomitic lime
especially with FFOF

please tell us how you corrected the condition

 

[PHATBLUNT420]

im still battling it to this day! but im sure its just a lockout and your getting deficient ...dolomite lime will keep up ph stable enough to avoid any lockout and provides some mag as well

what nutes and soil are you using?

 

[Hogdady]

what nutes and soil are you using?

gh floramicro, gro & bloom with foxfarm ocean forest

 

[PHATBLUNT420]

i was told from the hydrostore guy that when using FFOF you should add lime beacuse it is a high organic soil and has peat both of which make the soils ph drop causing lockout,

i have learned this the hardway and am now ganna be adding lime to any soil

 

[Hogdady]

i have learned this the hardway and am now ganna be adding lime to any soil

I was told that it's best to mix the dolomite and soil mebe a month before you need it to let it bond to the soil. :icon_cool

 

[caligrown]

Okay from what it seems. I had a similar problem. Unfortunately if you are running hydro, and your temps hit 88 degrees, you probably have root rot. Sorry dude at week 8 its kinda late you know. Root rot is really common and to be honest 88 is way too hot my friend. 78 is even pushing it, and if thats your minimum temp, thats a no go. What I suggest is if you can't lower temps, run some CO2. Not near your roots though, as they need as much O2 as possible. If you can run some hygrozyme, superthrive at 1/2 strength each and flush out a little bit. If anything, you don't really need Cal-mag. The iron in calmag (im assuming you use the botanicare line) could be locking out phosphorous and potassium. Check your roots if you can. If they are all brown then . Otherwise, perhaps lower the concentration and just run straight flora nova bloom. These nutes have the right ratios, you just have to hit the target ppm. Play around with it, add pure water, see how it reacts. Add more nutrients if you get negative results. That's what I do. Check out my grow for some tips too.

Oh yeah CaliGrown's 2nd grow Casey Jones and Bubble Gum from Oaksterdam! DWC!

 

[caligrown]

Oh, and also, I think you're just running way too high concentration. See your burning leaves on the bottom? Those get toasted first as they get the least light and the most nutrients (closest to the roots). The top go after, usually the main cola gets affected and then the middle branches.

My advice is...in hydro, you usually OVERFEED. Flush when in doubt, and check pH. pH is USUALLY the problem. If you don't own a pH pen you need to get one right away. You also need a ppm tester. Those are like 20 bucks shipped on ebay and trust me they work fine. Just get the Hanna Instruments Blue Primo.

That's what I usually do, and my plants are looking pretty okay. I think. Just watch them as much as possible, and adjust! I don't think cal-mag is necessary. Honestly I only put about 50 ppm of cal mag if at that. thats about 1-2 ml per gallon of distilled water. tap already has plenty of it.

OH AND do not add random crap like dolomite lime and stuff. Usually this will throw off your ratio. Trust me, GH in their Flora Nova has it down. That should feed your plant fine. In my experience, just add a little bit of flora nova bloom or purified water, nothing else. I've tried adding all this weird shit, it never really helps. a ppm pen is really crucial. If you can afford sweet and that 600 HPS, you can get this ppm pen.

 

[PHATBLUNT420]

yeah lower your feedings, and btw dolomite lime is not random crap dude , its a ph buffer and most ppl are smart enough to know its a vital part of mediums besides hydro which you definitely need a ppm, ph meter