What's wrong with this plant?

[waltwalt]

This is one leaf from one of my plants, but all the leaves on the plant look like this.
I'll fill out the full form if it's not a readily identifiable problem.

TIA
-walt

 

[JamieShoes]

Mate it looks like it could be a few things... the form and a few more pics (of the whole plant, leaf stems etc) would be very helpful ..


best of luck
j

 

[ICETOKER]

might want to check this out: http://www.icmag.com/ic/showthread.php?t=11688

my best shot is manganese(Mg) defficiency due to wrong ph value.... but i cant be sure.

What´s your medium, ph, ec and temps ?

and like jamie said it would make all the differnce to get a better wiew of the plant.

good luck with her, i bet she will pull it off ;-)

icetoker

 

[waltwalt]

SOIL:


How long has this problem been going on? 1.5 weeks
What STRAIN are you growing? Purple Kush
What was the establishing technique? Clone
What is the age of your plants? 5.5 weeks
How long have they been in the soil mixture they are in now? 4 weeks
Were they in the same mixture when they were seedlings/smaller plant? If not, what mixture were they in before? Cloner
How Tall are the plants? 36"
What PHASE are the plants in? Vegetative
What size pots are you using? 5 gallon pot 1/pot
What substrate/medium are you using? What brand of soil mixture are you using? Good stuff, can't remember the name at the moment, I've used it for a couple years.
What brand Nutrient's are you using? Iguana
How much of each nutrient are you using with how much water?15mL/gallon
How often are you feeding? Every two days
What order are you mixing your nutrients? Micro, Veg, additives
What is the TDS/EC/PPM of your nutrients used? 850

What is the pH of the "RUN-OFF"? No runoff, bottom feed. I'll top feed with some water and measure it's runoff tomorrow.

How often are you testing pH/ppm/EC/TDS? Everytime I mix the nutes.
What method of pH test was administered? Using Strips? pH pen? Calibrated pen + water color
How often are you watering? Every two days
When was your last feeding and how often are you feeding? Yesterday, every two days
What size bulb are you using? 2x1000W
How old is your bulbs? 1x6months, 1x8months
What is the distance to the canopy? 24"
What is your RH Factor? 40-50%
What is the canopy temperature? 86F
What is the Day/Night Temp? 86F/81F
What is the current Air Flow? Sealed room, fans always blowing, minisplit AC always running, dehumidifyer dehumidifying, CO2 injected and set to 1500ppm for lights on (Sentinel controller)
Is the fan blowing directly at plants? They oscillate
Is the grow substrate constantly wet or moist? No
Is your water HARD or SOFT? No
What water are you using? Tap
If using tap water, what is the ppm/EC/TDS of the water right out of the tap? 170-230ppm
Are you using water from a water softener? No
Has plant been recently pruned, cloned or pinched? No

Have any pest chemicals been used? If so what and when? Yes, Dr. Doom spray during lights off, alternating every 3 days with neem oil.
Are plant's infected with pest's? Yes, spider mites are in my garden, I kill most of them every 3 days, but you never really kill them all.


Here's the whole plant.

TIA
-walt

 

[JamieShoes]

have you run her before mate, does the PK normally have purple stems too?


seeing the plant as a whole it looks like mag or zinc def... but that's purely based on the pictures here - https://www.icmag.com/ic/showpost.php?p=163836&postcount=2

 

[waltwalt]

Yes this is the second time I've run this through soil, it's being fed the same. I have 10 other plants all cloned from the same plant all growing in soil around the edges of the room getting the same food and everything else. This and the other plant I have directly under the lights are looking like this. I'd say it's lightburn or something similar since they're the only two directly under the lights except it goes all the way down the plant. The original pic is a leaf from the bottom of the plant.

TIA
-walt

 

[JamieShoes]

sounds like you may already have found your answer then mate if thats the only descerning factor and the others are fine... you'd think 24 inches would be ok, but maybe they're getting some hot air blown over them...

seems odd that it would affect the entire plant though and not just the top? do you see much "dew" building up on that plant? or does the pot dry out a lot quicker than the others?

 

[waltwalt]

I haven't noticed any dew on any of my plants but it does seem to dry up a bit quicker than the others, I don't let it get to wilting but its definitely lighter than the others when it gets watered. I just attributed it to being directly under the light they used more water.

TIA
-walt

 

[JamieShoes]

I ask because it looks as though the trouble is worse at the bottom, which would seem to denote a hunger issue....

if it were me I'd consider giving her 50% extra at watering and see if she perks up a bit....a splash of kelp/rhizo probably wouldnt hurt either