HELP: Leaves Curling down to upside down canoe shape

[smokedogg3]

I am running a top drip lucas formula in clay pellets. It is about the 18th day of flowering and I the leaves are starting to canoe downwards. There are some that still look nice but I know the longer the problem goes untreated it cannot be good for my ladies.
My resi sits at around 1150-1200ppms and the ph has been 5.5-6.3. Maybe the ph is causing this? lucas formula using only maybe 3/4 strength.

I have tried refilling the res and flushing and that didnt really do anything. I have lowered to 600ppms at one time but felt that it made my ladies drag in growth so just went to regular 1100. I read that this curling down could be nitrogen toxicity.

Im flustered. Cant figure this shit out. Please help. Maybe I can get a pic to post but I feel that this is a common problem? not sure. Any advice from the lucas gods would be greatly appreciated. Thanks.

 

[Snype]

It would help a lot if you can fill out the form in the sticky and put up a couple of pics without the HPS light.

 

[smokedogg3]

what form in the sticky should I fill out? not quite sure what you are talkin about. will take a couple pics within the day

 

[Snype]

https://www.icmag.com/ic/showthread.php?t=11688

 

[smokedogg3]

Answered it the best I could. I have had success in the past and it seems like i didnt change anything but to my setup. same formula. equip. etc.

HYDROPONICS/Aero Ponics/Coco/Soiless/

How long has this problem been going on? 9 days
Are you growing in a PVC grow tent? No
What system are you running? Top Drip. Clay pellets
What STRAIN are you growing? OG crossed with something... I think strain is LA conf
What was the establishing technique? Clone
What is the age of your plants? 18 days flowering. Vegged for a while. Were super healthy
How long have they been in there mixture they are in now? 1 month
How tall are the plants? Close to 2ft
What PHASE are the plants in? 19 days flower
What Technique are you using?
What substrate/medium are you using? Hydroton
What is the Water temperature? 65-71
What color are your roots? White? Brown? Are your roots slimy? ??? whitish brown?
What Nutrient's are you using? General hydroponics
How much of each nutrient are you using with how much water? Lucas formula 8-16-0
How often are you feeding? 15min on every 2 1/2 hours
How often are you giving nutrients? every 2 days to keep resi stable. lucas add back
What order are you mixing your nutrients?
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"? 5.5-6.3
Are you sure your calibration is correct on your equiptment? yess?
When was your last feeding change? (ie. grow-bloom-micro-additional)
How often do you clean your system: 2 times a cycle
What size bulb are you using? 2 600s
What is the distance to the canopy? 19-22in
What is your RH Factor(Relative Humidity)? 45-60
What is the canopy temperature? 71-74
What is the Day/Night Temp? 60s at night
What is the current Air Flow? not sure a lot
Tell us about your ventilation, intake exhaust and when its running and not running ? always
Is the fan blowing directly at plants? oscillating
Is your water HARD or SOFT? ro
What water are you using? Reverse Osmosis (RO)? ro
Are you using water from a water softener?no
Has plant been recently pruned, cloned off of or pinched no
Have any pest chemicals been used? If so, What and When? no

 

[Snype]

If you changed your set up you most likely have to rework your formula. Enviroment plays a role in this. I would love to see a pic if you can get one. Let me do some thinking but now that you have the form filled you'll get some help from others also.

 

[smokedogg3]

My conditions are the same as before. I am puzzled and not sure what to do. I will have pics up within the next day or 2 for sure. Possibly in the next couple hours.

 

[smokedogg3]

Im thinking nitrogen toxicity? Do I flush? Do i know when to bump the nutes back up?

 

[Snype]

I would start flushing with 5.8 pH'd water for a few days. Try and get some pics and keep us updated. Also if your roots are browning you know you got a problem. Are the roots getting any light?

 

[smokedogg3]

I have no burns on the leaves. I have read something where it might be that the humidity in the room might be TOO LOW?!?! Ive tried everything else. Is there a simple way to increase humidity without turning off my exhaust. Its just not doable in my case.

 

[Snype]

If you want to try to get the humidity up, try putting some buckets of water in the room and use the exhaust in less frequent intervals. But from what you said you already have it at around 50% which is good. The browning of the roots though is pretty suspect. Are they slimy? Your water temps are good.

 

[mrwags]

Their getting to hot temp wise is my guess. Sounds to me like you have done this b4 so your mix I'm guessing is the same as always so ask yourself what is different this time compared to the last grow?

What are you temps at the plant level? You can have a 70 degree room but at plant level it could be 90 or so if the light is to close. But always remember pics will get you the correct answer more so that an educated guess.


Have A Nice Day
Mr.Wags

 

[STRAINZ]

Can't help too much, but I think that some of the OG strains may have tendency to do this! I have some SFV OG s1, and had some SFV OG x Chem D, and some of the plants did exactly what your describing. The good news is that it doesn't seem to be stunting the plants growth. I'm only half through flower, but I have one OG with those symptoms and one without...Their growth is equal.

Good Luck

 

[smokedogg3]

Im not sure if the picture came through but there it is. Its like the leaf is shaped like a claw. the lights are off so everything is droopy but you can see some leaf with the claw or curl. no nute burn or anything like that so now I am thinking low humidity. Everything looks good but that leaf curl.
What do you think?

 

[smokedogg3]

oh and as for the OG strain doing this out of genetics... I dont think that is correct. Ive ran this strain a couple of times but have only recently had the problem. What is the ideal humidity in the flowering stage. im close to 3 weeks in. I checked the humidity and it fluctuates from 39-50. my temps are 70-75 at the canopy so i really dont believe that is my prob. What are your thoughts mrwags?