Chlorosis in older leaves followed by necrosis

Discussion in 'Sick Plants and Problems' started by H3mp-16, May 3, 2011.

  1. It has been a while since I've had to post a sick plant problem, but this time im getting my ass kicked.

    I can't find my camera, so until I do I will paint a picture with words

    The plants are young, under 3 inches tall. I have added dolomite lime to the top of the soil a week ago to control pH.

    Now they are going into what apears to be a nitrogen deficiency. Only problem is that when I fertilize the damage slows to a halt, they have a slight growthsburg, and then they resume the yellowing within 2 or 3 days. I'm using a light nutrient mix of MG 7-7-7 mixed in the water.

    Now they are becoming necrotic in the older leaves. It is effecting most of my plants (about 85%). My pH tester is telling me 6.9 pH, with too little fertilizer (yeah it does that dumbass fertility test). But as of late the chlorosis is hardely even slowing down when I fertilize.

    Im thinking of doing a flush on all of my plants, but I dont know if it's too much fertilizer causing salt toxicity or if its a legitimate nitrogen def. Maybe I should be increasing fertilizer, i have no idea.

    I will die if I have to restart my grow again, please help.
  2. Hi.

    Theres a few things goin on here...

    First - get that Ph down to 6.3 - 6.8 -it is affecting the plants ability to feed.
    Second - The nutes u are using are not supplying enough nutrients.

    MG uses timed-release-nutes. That means the nutes are released into the
    soil, very slowly, over time. Not good for weed. They want what they want
    right away, and they show it, as u can see.

    Third - why would u flush an already nutrient deficient plant ???

    Get the Ph in line, and get some better nutes, and everything will fall into place.

  3. In retrospect, Im sure the lime is Fing
    with the Ph, and it is a young plant.

    Flush as u are doing then tackle my first post.

    Hope this helps.

  4. These aren't the time release nutrients, just regular old liquid fertilizer. After work today I will flush the plants and see how it helps.

    How would the dolomite be putting the pH in a bad spot? Ive been using it as a pH buffer for years. Haven't had many problems.
  5. U can see what the DL does - the ph is at 6.9
    and its affecting the plants ability to feed.

    The nutes are there for it - it just cant access
    them properly becuzza the high Ph.


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