Yellowing - Form & Pics

[ledtime]

How long has this problem been going on? 1 WEEK
What STRAIN are you growing? CRITICAL SENSI STAR, WHITE WIDOW
What was the establishing technique? (seed or clone?) SEED
What is the age of your plants? 21 DAYS FROM PLANTING SEED
How long have they been in the soil mixture they are in now? TWO DAYS
How Tall are the plants? 3-4""
What PHASE (seedling, vegetative or flower) are the plants in? VEGETATIVE
What Technique are you using? (SOG, SCROG etc) JUST GROWING THEM UP.
What size pots are you using? (Include how many subjects to pot) ONE GALLON
What substrate/medium are you using? What brand of soil mixture are you using?(percentage of perlite, vermiculite...etc?) FOX FARM OCEAN FOREST - STRAIGHT FROM BAG
What Nutrient's are you using? FOX FARM TRIO - NONE USED YET.
How much of each nutrient are you using with how much water? SEE PREVIOUS
How often are you feeding? NOT YET, BUT WILL EVERY OTHER WATERING
If flowering, when did you switch over to using Bloom nutrients? N/A
What is the TDS/EC/PPM of your nutrients used? 220PPM TAP WATER
What is the pH of the "RUN-OFF"? 7.5
What method of pH test was administered? Using Strips? pH pen? MILWAUKEE PH55 METER
How often are you watering? EVERY 3-4 DAYS
When was your last feeding and how often are you feeding? LAST WATERING SATURDAY - FLUSED TODAY.
What size bulb are you using? 400W HPS COOLTUBE
What is the distance to the canopy? 12"
What is your RH Factor? (Relative Humidity) @ 41%
What is the canopy temperature? 80
What is the Day/Night Temp? (Include fluctuation range) 80-82
What is the current Air Flow? (cfm etc.) 36" STANDING 90DEG ROTATING FAN
Tell us about your ventilation, intake exhaust and when its running and not running ? 200CFM WINDTUNNEL PULLING AIR FROM TENT THROUGH COOLTUBE VENTED OUTSIDE
Is the fan blowing directly at plants? YES
Is the grow substrate constantly wet or moist? I LET IT DRY OUT ABOUT 90% THE WATER
Is your water HARD or SOFT? 220PPM, BUT HAVE A R/O SYSTEM IF NEEDED.
What water are you using? Reverse Osmosis (RO)? Tap?
Bottled? Well water? Distilled? Mineral Water? TAP PH'D AT 6.8
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? SCHULTZ VEGETABLE SPRAY (PYRETHRIN)
Are plant's infected with pest's? NO - WAS WORRIED DUE TO SOME WHITE SPOTS THAT HAD APPEARED SO I GAVE THEM A LIGHT MISTING OF THE INSECTICIDE.

 

[medmaker420]

well looks like a deficiency.

the no nutes thing might need to be changed to "first veg nutes fed" soon.


wait,

you just talked about flushing as well. I wouldn't be flushing FFOF in veg especially that early.

 

[ledtime]

Only flushed because the runoff PH was 7.5, a little too high. However after running three gallons of 6.8PH water through a one gallon pot the runoff hasn't changed a bit.

 

[EvilTwin]

Hi Ledtime,
One thing I noticed was that the discoloration seems to be more at the top then the bottom of the plants. Since the shots are straight down from the top, it's a little hard to tell. And related to that...isn't 12" a little close? I know it's only a 400watt, but there could be some light bleaching added into the picture.

I'm guessing that the one that shows the most interveinal chlorosis is the White Widow? They're Mg hogs so you better do what you can to correct the ph (lower ph water/nutes) and get some food in...like medmaker suggested. And a little Mg too. I use Epsom salts at 1/4 tsp per gal.

It's not too bad though and they have every potential for a quick and full recovery...
ET

 

[ledtime]

Here's a nice note, I just took some fresh FFOF soil and put it in a clean cup with holes in the bottom. I took 6.6PH RO water and ran it through the soil. The water that came out was at 7.5PH. Same problem I'm having now.

Did I get a bad batch of soil here? At $25/bag you would think it would be buffered in the right range.

 

[ledtime]

The ones with the heaviest chlorosis is the Sensi Star. The widow is actually best looking one.

 

[EvilTwin]

Here's a nice note, I just took some fresh FFOF soil and put it in a clean cup with holes in the bottom. I took 6.6PH RO water and ran it through the soil. The water that came out was at 7.5PH. Same problem I'm having now.

Did I get a bad batch of soil here? At $25/bag you would think it would be buffered in the right range.

No, not a bad batch of soil. Ganja likes acidic soil but many other plants grow just fine in a slightly alkaline range. Totally depandent on what your growing. And we growers are in a tight spot since no US companies are going to sell specific ganja soil. So we have to tailor it and amend it till it's where we want. There is acid soil available. The biggest point here is that you can't make assumptions. Always check soil ph before using.

I was referring to the chlorisis that occurs between the veins that gives it a striped pattern. Is that the Sensi Star? That's a mostly indica and probably a nute hog in general.

Anyway, good luck and hope you get it all squared away.
ET

 

[jyme]

just by judging from the pics and asuming that its mostly in the top and middle of the plant and your ph is so high its gunna be a zinc defcency. its immoble.zinc and copper start geting hard to obsorb at 7.5 and any thing closter to 8.0 it is completly locked out.i would lower my ph around 6.5 if i was you. good luck.

 

[Walt Jabsco]

light bleach

 

[etinarcadiaego]

I also run my plants under a 400 watt light and they're 3-4" from the bulb and I get no bleaching. Still it looks kinda like light bleaching, just without the usual heat stress.

Hmm

 

[ledtime]

Plants are all fixed. It was light bleaching. I moved the light up to 14"-16" and all is fine.