Brown Spots and Yellowing of the Leaves

Discussion in 'Marijuana Plant Problems' started by purplehaze007, Nov 12, 2007.

  1.  
    CHUCKTYLAH

    CHUCKTYLAH Active Member

    Because there are several threads with the answer in them.
  2.  
    budbo

    budbo Member

    hey im growing a coupler plants on my windowsill there about a mouth old and have started 2 get brown spots on the leafs could anyone help me out plz
  3.  
    Bro Montana

    Bro Montana Member

    I see this post is from along time ago, but did you ever figure out the problem? I grow under FL for veg and CFL for flowering and I started putting my plants our to veg in the sun at about 80-85 degrees outside temp and they started to curl, yellow and brown on some leaves.
  4.  
    crystaldb

    crystaldb Member

    2 cjsesh00
    Hi i am just wondering how u made up ur weak solution to spray on ur plants when they were nutrient deficient i have just noticed one my leaves r starting to turn and i want to sort b4 gets worse thanx
  5.  
    iNFID3L

    iNFID3L Active Member

    would you say 4 weeks old is too young to spray with fert ?
  6.  
    iNFID3L

    iNFID3L Active Member

    no answer ?
  7.  
    shotnva777

    shotnva777 Active Member

    Don't plan on getting one... I've had tthe same problem on EVERY plant... Not yet a correct answer. I've had to figure it out on my own!
  8.  
    daleshell

    daleshell Member

    check under leave for spider mites or your locked out check run off ph mag all the normal if not flush
  9.  
    stickyicky0420

    stickyicky0420 Well-Known Member

    lol look how many people asked the same question on this thred :)
  10.  
    uksecretsensi

    uksecretsensi Active Member

    answer to all the questions. red stems and leaves curling upwards is mag def. red stems and leaves curling downwards is N overfert. brown patches or spots with light coloured leaves is underfert N P K levels are too low. brown spots are an indication of potassium def. just add fertiliser with a good npk ratio. 2.1.1 for veg and 1.2.2 for flowering.
  11.  
    sweetis

    sweetis Member

    Holy fuck lots of misinformation here. Brown spots can mean LOTS of things. Most common is calcium deficiency. You can't accurately diagnose a plant without seeing pictures.
  12.  
    sheik yerbouti

    sheik yerbouti Member

    One thing you also have to watch out for is "bloom" nutrients or nutrients formula's for Cannabis having too little N during the flowering phase. I used to get the yellow leaves by week 3 with straight bloom formulas, best to keep the N higher until at least the stretch is over. Best of luck
  13.  
    sheik yerbouti

    sheik yerbouti Member

    Brown spots WITH yellowing and dieing off leaves. Most commonly N def, could be Cal def but most likely N def.
  14.  
    lmbmusic

    lmbmusic Member

    Hey Can anyone tell me what the problem with this girl is ?

    There are little brown spots on the leaves


    20130406_110125.jpg
  15.  
    TDM

    TDM Active Member

    Be careful in diagnosis...overwatering, the MOST common mistake made by beginners, can also cause some leaf spotting and yellowing.
  16.  
    beansbeansbeans

    beansbeansbeans Active Member

    Anybody realize this thread is 5 years old
  17.  
    beansbeansbeans

    beansbeansbeans Active Member

    The op is long gone.
  18.  
    ndm1952

    ndm1952 Member

    Ridicules statement.. Have you ever heard of Greenhouse Supplemental Lighting ?? Sun by day, Artificial at night, to stay at 18 on 6 off ?? Lastly, as bad as Mites are, nothing compares to Powdery Mildew..
  19.  
    JonnyAppleSeed420

    JonnyAppleSeed420 New Member

    Yes pictures say more than words.

    5 years old and only one pic???

    Really? I'll give you a hint to solve your PM problem...De-humidifier....JAS

Share This Page