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Pistils/leaves turning brown?

Discussion in 'General Marijuana Growing' started by Chalcy, Sep 17, 2006.


    Chalcy Active Member

    Hi, everybody.

    This is my first post and my first grow. I'm not sure whether I have a problem or not.

    First, I have three plants, all female all growing outdoors. All are in early bud. I saw the first white hairs around September 1. The hairs don't seem to stay white, though. They turn brown, which I thought wasn't supposed to happen until the final stages before harvest.

    The buds don't seem to be dying. They're continuing to grow and I'm feeding them with Miracle-Grow bloom formula. They just don't stay white. Is this normal?

    Also in the last couple of days, a few small leaves on one plant have turned brown on the tips. Not a dry brown. The leaves actually seem to turn to mush. It's always the small leaves. In all but one case the mush was on the leaf tip. I worry because in the one exeption, where the whole leaf turned, the mushy brown started right next to a bud.

    The other two plants, which are in a different location, aren't affected by the mush problem, but their buds also have brown on them.

    Can any of you more experienced people tell me what's happening and what I can do?

    Thank you!

    Sublime757 Well-Known Member

    is there any way you could get a picture? i could tell you a lot more if i can see it

    Chalcy Active Member

    Thank you, Sublime757. I'll try to get pix, but my digital camera is a POS and won't give me any closeup resolution so I'm not sure what I can do.

    Reading up on nutrient deficiencies and pests, the only thing I can come up with (for the leaf problem not the buds) is a copper deficiency. The Marijuana Grower's Guide says to treat that with fungicide, but it also says a Cu deficiency is rare.

    The mush sure looks like it could be a fungus, though.

    Chalcy Active Member

    I've been reading some more and I have a guess.

    I found this quote at Cannabis Health Issue #4 May/june 2003

    "Excess phosphorus could cause micro nutrient deficiencies in zinc and iron. Cannabis uses phosphorus for photosynthesis, respiration, storing carbohydrates, cell division, it is also involved in energy transportation (ATP, ADP), nucleic acids, enzymes and phospholipids that are important for membrane structure. Phosphorus helps build strong roots, is vital for seed and flower production. Highest levels of phosphorus are used during germination, seedling growth and flowering. However, that does not mean that cannabis is a phosphorus hog. It is not. It consumes more potassium and nitrogen and magnesium than phosphorus. It will use more phosphorus in flowering than in its vegetative (growth) stage. Also, excess phosphorus can cause a decrease in uptake of zinc, iron and copper, which will start a chain reaction of other macro and micro nutrient deficiencies."

    I'm thinking maybe the Miracle-Grow bloom formula, which is loaded with phosphorus, could be causing a micronutrient deficiency.

    Just in case, I'm going to flush the soil and back off on the fertilizer. I already washed the leaves off. But any other advice will still be a big help. I'm shooting in the dark.

    My own pictures didn't work out. The closest picture I found online to my problem is this: http://www.marijuana-seeds.net/Thanks/P_Decifient_G.jpg

    But that says P deficiency. It also says the leaves would be brittle. My leaves that are affected more like dissolve between my fingers.

    Sublime757 Well-Known Member

    definitely flush the soil and id stop using the miracle grow. miracle grow is a company that i would never use for a cannibus. go ahead and pull off all the effected leaves to avoid this spreading
    Garden Knowm

    Garden Knowm The Love Doctor

    Are you PH ing your water?
    Gardners can be split into 2 camps.. those that use MG and those that hate it.. LOL

    If you do use it.. make sure you PH your water to 6.5 - 7.0 and start with a heavly diluted formula... you DON'T want to burn your PLANTS..


    Chalcy Active Member

    Okay, I flushed the soil, replaced the top inch or so, pulled the affected leaves, and took a vow to stop trying to help my plants with so much MG.

    The PH of my water is around 6.8, so I'm okay there. Now I just need to watch and see what develops.

    I'm still confused about why my white buds aren't staying white, but maybe that's related to the leaf problem?

    I was going to ask why not to use MG, but I see somebody else just started a thread about that, so I'll just watch the discussion there.

    Thank you!

    Chalcy Active Member

    Keeping an eye on these plants, I realized that at least some of the browning in the pistils was because they were turning into the same gray-brown fungal-looking mush as those small leaves. Damn damn damn damn.

    So besides everything I already did, I sprayed the worst-off plant with some dilute copper fungicide. Pray for my sick babies, okay?

    Spraying the copper also got me wondering about all the crap I've been putting on these plants. I mean, I just sprayed heavy metal on something I plan to be smoking two months from now. And I don't know what exactly is in all that Miracle Grow I've been using, either.

    I know plants grow in dirt and all, so it's not like they're sterile. I know you stop fertilizing a week or so before harvest to avoid the worst of the gunk. But still, am I making these plants toxic by treating them with fertilizers and fungicides?
    Garden Knowm

    Garden Knowm The Love Doctor


    potroast Uses the Rollitup profile Staff Member

    Oh yeah, a sulfur burner for your outdoor plants. You'll really stink up your neighborhood! :roll:

    The fungus that you are seeing will destroy your buds. Spraying with a fungicide may help some, but it may be too late.

    Spraying your buds with anything is risky, it may affect the taste. In the future, maybe try a natural fungicide, like garlic. I've found that it doesn't affect the taste at all.

    Chalcy Active Member

    I was afraid of that. Damn.

    Besides spraying with copper, I picked off every bit of bud and leaf that I could find that looked like the fungus had hit it. I also moved the plants indoors to keep them warmer and drier. So far I don't see any additional damage. Maybe I'll luck out but right now I'm not counting on anything.

    Garlic. I wouldn't have thought of that. I'll do a search to see how to apply it.

    Maybe that sulphur burner will come in handy if I ever get serious and if I keep my grows indoors. Right now I'm a newbie with three plants and I don't think I'm ready for that. Thanks, though. I didn't even know things like that existed.

    Chalcy Active Member

    I have to make a hard decision this weekend. My baby has bud rot, and all my tries at picking off the crud and keep it from spreading by using copper fungicide aren't working.

    I've read and read and the advice is all over the place. Keep the humidity down, keep the air circulating 24/7, get rid of the plant, use silicone, pick off the effected bud, cut off the entire branch or just give up and pray it doesn't spread to the other two plants.

    I think I'm going to start by cutting off the top three inches of my poor baby cause that's where the worst rot is. I'll also do that on any stems where I see rot.

    Any other advice?

    If I'm careful to cut away all the fungus, can I use the parts of the plant I cut off? Some of the advice I've read says yes.

    Should I separate this plant from the others. If I do, the only option is to put it outside where the weather is really crap.

    If I keep it inside and keep the fan blowing on it, won't the spores spread to the other plants, even if I make sure the breeze points away from them?

    HELP. It's just killing me that my first plant, that I nursed all summer long, is dying like this.
    Garden Knowm

    Garden Knowm The Love Doctor

    Good point.. my bad... I missed the OUTSIDE part....

    :confused: :confused:

    potroast Uses the Rollitup profile Staff Member

    Yeah, believe me we feel your pain! The hardest thing for a farmer to do is throw away his crop, that he has worked for months to produce.

    Yes, cut away the bud rot. Leave the plants as they are, to continue flowering. When you harvest, cut away all budrot, or it will continue to spread during drying. After drying, whatever bud you have that doesn't have fungus will be fine.

    HTH :mrgreen:
    Garden Knowm

    Garden Knowm The Love Doctor

    Be very gentle and careful when you cut that stuff off... have a plastic garbage bag near by so you can just drop the FUNGUS directly into the trash...
    Treat that shit like toxic waste...

    Don't disrupt it unnecessarily.. This can make the problem worse.. You don't want that spore living in your room....


    Sublime757 Well-Known Member

    lysol the place down when everything is said and done. remove your plant first of course
    green thumb matt

    green thumb matt Active Member

    sounds like a fungus or rot. pluck the leaves that are sick. pinch off any buds that look like this but until the green part of the buds turn black i don't think there is a problem. What's the humidity level, around 72-80 percent humidity is ok for budding but over that in the 90's will create bud rot and fuck your whole crop with black gushy shit.

    brainiakbeatz Member

    im using safe garden organic mix, my plants are 2 weeks old and a 3 days ago i noticed my leaves turning dark green atthe tip, then by the days its been speading, and now its stoped groing bu the new set of leaves are ok?
    its barly going on its second set of leaves? u think if i cut the leaves where its turning browit will help?
    i was using rain water and they was doing fine , i think this started when i started to use tap water, i need to get a ph tester,
    but is there anything i can do to save my plants?

    i piad top doller for these seeds and now i dont got any more.
    u think if i add nutes it will help? i think its too soon, cus its barely on its second set of leaves .
    its growing really slow barely . i repoted them see if that will help.

    is it cus im using organic mix?
    the soil gots alot of wood chucks.

    i cant even sleep cus of this situation

    MartinezTree Active Member

    Its normal for the hairs to turn brown

    blueface101 Member

    i have brown tips as well but mine are 3 weeks old and are dropy what do i do

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