Guide for Diagnosing Plant Problems

Discussion in 'Marijuana Plant Problems' started by shenagen, Dec 13, 2007.

  1.  
    shenagen

    shenagen Well-Known Member

    I came across this neat little list that can probably help a lot of people out. If you like it check my post in the General area...I need some help!

    Quick Deficiency Guide

    Nitrogen: Entire plant is light green in color; lower leaves are yellow; growth is stunted....

    Phosphorous: Entire plant is bluish-green, often developing a red or purpleish cast; lower leaves may be yellow, drying to a greenish-brown to black color; growth may be stunted...

    Potassium: Leaves have a papery appearance; dead areas along the edges of leaves; growth is stunted...

    Magnesium: Lower leaves turn yellow along the tips and margin and between the veins; the lower leaves wilt...

    Calcium: Young stems and new leaves die...

    Zinc: Leaf tissue between the veins is lighter in color; yellowed; papery in appearance...

    Iron: Leaf tissue appears yellow, while the veins remain green...

    Copper: Leaf edges appear dark green or blue; leaf edges curl upward; young leaves permanently wilt...

    Sulfur: Young leaves turn pale green, while the older leaves remain green; plant is stunted and spindly...

    Mananese: Growth is stunted; lower leaves have a checkered pattern of yellow and green...

    Molybdenum: Leaves are stunted, pale green, and malformed...

    Boron: Young leaves are scorched at tips and margins...
  2.  
    shenagen

    shenagen Well-Known Member

    OK here is a start of some links........
    THE MARIJUANA GROWER'S GUIDE..........by Mel Frank & Ed Rosenthal
    This is some of Ed Rosenthals book...good read

    International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!
    One of the better sick plant guides I've come across

    Cannabis Nutrient and Deficiency Table

    http://www.rollitup.org/general-marijuana-growing/1469-marijuana-plant-problems-cures.html
    This one is definately in the wrong area...I was on this site for over a month before I used it.

    http://www.ganjaguerrilla.net/index.htm

    I'll update this list as I find more usefull info
    Last edited by a moderator: Jul 23, 2008
  3.  
    BMWEATER

    BMWEATER Well-Known Member

    awesome guide! Thumbs up!!
  4.  
    miggzeh

    miggzeh Well-Known Member

    My plants need phosphorous, poor little purple bastards.
  5.  
    shenagen

    shenagen Well-Known Member

    Thought it could help...so I've been wanting to ask for a while now....what makes you a bimmer eater?(what do you ride?) We may have to schedule a roll it up race!
    max420thc, wpuckw and gstringer like this.
  6.  
    HatlessCow

    HatlessCow Active Member

    thanks a lot man, this is exactly what I needed haha
    damn phosphorous..
    :blsmoke:
  7.  
    shenagen

    shenagen Well-Known Member

    Your welcome...it may be a repeat but hey.....I miss stuff on here all the time
  8.  
    shenagen

    shenagen Well-Known Member

    Just casting another vote to sticky this....anyone else think so? If not I'll shut up!
    ZEN MASTER and Spine Vac like this.
  9.  
    dasmokinbudz

    dasmokinbudz Active Member

    you have my vote to sticky this



    EVERYONE SHOULD READ AND USE THIS GUIDE!
  10.  
    cheetah2007

    cheetah2007 Well-Known Member

    my plant need Molybdenum
    reeferMadnesc likes this.
  11.  
    dasmokinbudz

    dasmokinbudz Active Member

    what about over nute-ing. how do you tell that???
    GrimReefa likes this.
  12.  
    shenagen

    shenagen Well-Known Member

    Yellow, burnt looking leaf tips is a good indication.... and a tds meter.
  13.  
    shenagen

    shenagen Well-Known Member

    I just read through some posts that this would be usefull.
    Sticky it mods
  14.  
    dasmokinbudz

    dasmokinbudz Active Member

    ive heard that a plant turning purple is a nute def. is this true or just a rumor?
  15.  
    willgrow1day

    willgrow1day New Member

  16.  
    herbose

    herbose Well-Known Member

    Sticky for sure, just solved my current problem. Most leaf info is spread out over many book pages and many posts. This is very compact, very useful to someone like me with a short attention span and quite possibly a little high.
    Kudos!
  17.  
    johnnyquest

    johnnyquest Active Member

    Cool post the other link to the cannagraphic forums is good stuff too. Anyone know how much epsom salt should I use for foliar feeding?
    edit: my bad stupid question.
  18.  
    GrimReefa

    GrimReefa Well-Known Member

    lol i think my new clones need it all shud i ad a lil nutes, i ahve nutes but nto using em yet
  19.  
    shenagen

    shenagen Well-Known Member

    I haven't done clones yet, just seed, but I'm pretty sure you should give them 1/2 strength base nutrients.
  20.  
    grodrowithme

    grodrowithme Well-Known Member

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