Day 38 And Very Yellow Leaves. Green Crack, Blue Dream, Thc Bomb...

Discussion in 'Growing Marijuana Indoors' started by johnjoemurphy, Aug 10, 2014.

  1. Okay so brief history on the grow so far.
    \nI am on day 38 since the I flipped to 12/12.
    \nSet up: I am growing using 70/30 coco/perlite in Autopots. 2 x DR240w tents with 2 x 600w HPS in vertical parabolic reflectors. Both tents have their own reservoir but they are on the same schedule.  
    \nFood: I've been using Canna nutes at the regular feed amount per their schedule, along with Rhizotonic & Cannazym. I also use Canna PK 13/14 However Canna recommend only to use this for one week. In all of my previous grows I use usually 2 weeks before and 2 weeks after their suggested time starting at 1/3 strength then 2/3 with full does in the middle. I've never had any issues feeding this way before.
    \nClimate: It has been fine around 75F for the most part dipping to 65F at lights off, only have one sensor in the tent placed right under the bulb so cant say for sure that those temps hold true all over the tent. Sensor in my 2nd tent also read the same though. I'll be honest it is unusual for me to have temps like this I almost always have issues with high temps in the 85F-90F range sometimes during lights on, but not this grow even though we have had some of the warmest weather in years.
    \nHumidity: This is an issue always above 60% going as high as 75+% at times. Nothing I can do its very humid and damp where I live and my are is piped in from outside. Every grow is like this.
    \nPests: I do have a bad white fly (or maybe gnat) infestation at the moment. I have some H2O2 coming which I will be using as a foliar spray to try and get rid. Fan leaves are fairly riddles with tiny white marks where the fuckers have been sucking on the leaves. I was not able to get the H2O2 before now, it should be here Monday/Tue.
    \nOther Factors: I'm embarrassed to admit I have not PH'd my water in a long long time. When I started growing I had a formula for amount of PH- that was needed per litre which worked for me up until now. My PH meter is broken so I cannot check if it is a PH issue but I have ordered a new one it should be here Wed/Thur. Also I have a PPM meter which I never used. It is one of these cheap ebay yokes.
    [​IMG]
    According to Canna my total EC should be 2.4 this week I took a reading of 1290 from Tank A and a reading of 1150 from Tank B 2 nights ago when I took the photos below. Now I'm not sure how to convert but by the looks of it I am well below 2.4 no matter what conversion I use on this chart 
    \nI brought the feeding up to Cannas High schedule and will be returning to the grow tomorrow night hopefully it is just a lack of nutes but I'm worried it may be lock out due to PH or some deficiency. Maybe even the gnats/whiteflies (im not sure what they are to be honest, i think gnats)
    \nAnyway here are some photos of the Green Crack, Blue Dream & THC Bomb. They are all new seeds but I have grown these strains before and they are 8 weekers. This is the tent that is being fed by the tank with the lower EC. In the other tent i have the same issue but not to the same extent, the strains in the other tent are all meant to be shorter flower than this tent (Gigabud, Delahaze, Pineapple express, Northern Lights x Skunk)
    \nAnyway here are the photos I'd appreciate any help or ideas that you might have. Thanks!

    [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG] [​IMG][​IMG]

     
  2. Have you supplemented with magnesium at any time

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  3. #3 johnjoemurphy, Aug 10, 2014
    Last edited by a moderator: Aug 10, 2014
    Nope never.
     
    It does look a lot like that alright though!

    I have epsom salts, what do you recommend I do?
     
  4. One 5ml teaspoon per 5litre of water, I do at 3 and 6 week of flower
     
  5. okay thanks dude.
     
    well I'm just starting week 6 I'll give it a try, can it cause any adverse effects if its not the problem?
     
  6. Ph it, id say that is your problem though

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