Nute burn?

Discussion in 'Plant Problems' started by MJking, Mar 5, 2010.

  1. MJking

    MJking Registered

    Hey guys, a lil more than 2 weeks in this showed up. Pretty sure thats the first leaf to show these symptoms but other more mature leaves are starting to show the spots as well...Haven't added anything except tap water or water from brita filter.

    I'm using MG 6 month feed...which I'm beginning to read about and seems this might be the problem..?

    Thanks for any feedback.

    Attached Files:

  2. djmidnight22

    djmidnight22 Registered+

    I seem to be having the same problem with my girls. I had this problem with my first grow when using miracle grow ferts, but luckily was able to finish off my grow before the damage was fatal. I'm currently using FFOF and a whole different line of nutrients and i'm still having the same problem. I tried flushing with ph corrected water and such but still to no avail. I would try giving her a good flush at the least when using the miracle grow. I'm curious to find what the problem is myself. Goodluck! :hippy:
  3. moody420

    moody420 Registered+

    yep, looks like nute burn! you are using too much.....

    i would suggest trying something other than MG. Go to your local organic garden store or hydro store and get yourself some good nutes. :jointsmile:
  4. Faddenator

    Faddenator Registered+

    I recently learned that most generic plant foods have feeding schedules that are far too strong for cannabis. With MG you should cut the recommended feeding in half at least. I like to start with a 25% solution of MG and work my way up.

    Then again, I'm never using MG again haha. my current grow will be over in a couple days and after that, MG will be a thing of the past for me.
  5. MJking

    MJking Registered

    I haven't actually added fertilizer, yet.. i bought MG six month fertilizer release soil and i'm almost certain it's the culprit. The plants growth were still very strong but the necrotic spots were getting stronger.

    it started spreading to younger leaves so I went to lowes and got a bag of all organic cow manure derived compost and a bag of mushroom compost. I mixed those up and transplanted. I'm hoping that mushroom compost contains plentiful mycorhizzae. Allows for better symbiotic/fungal relations with roots and the soil. Hopefully the plants can deal with transplant shock for a 3rd time...:(
  6. superskunk1

    superskunk1 Registered+

    I dont think that was a good idea believe all that compost contains nutrients and even if its a nute burn it would mean it has a nute lockout.

    Like the above poster said try flushing it (ex. 5gal bucket 10gal of water) and see what happens.

    Only problem with that is MG contains nutes that are activated by water so it might still have nutes in the soil you dont want to release anymore. But there not much you can do (hope you are in Veg)

  7. MJking

    MJking Registered

    Alright-- I'm in the process of flushing these girls and just bought some soil testing tube/pill things. I don't see how keeping them in the miracle grow soil is a better idea than getting them out of it and into something more natural but I'm a noob.. and just saw the trouble shooting so i'll fill it out to my best ability.

    What is your experience level? first time

    Your Equipment:
    .1) Type and wattage of lights. 10 CFL's... i add a few every week or so
    .2) Distance from tops? inches
    .3) Reflector type? the entire place is covered in aluminum foil
    .4) Is there a consistent fresh air supply? De-humidifier and oscillating fan
    .5) Do you have an exhaust fan and a circulation fan? see above
    .6) What are the bulb wattages, kelvin ratings, and schedule? 26 W, 6500 K, 1600 Lumens per. 18/6.. sometimes 24/0

    Your medium:
    .7) Specific brand and type of soil, (coco, peat based soilless...) and anything you've added to it. (vermiculite, perlite, worm castings...)
    I started with MG six month release feed soil. Started getting burned transplanted to a mixture of organic cow manure derived compost and mushroom compost --both from Timberline
    .8) Size of container. two plants are in a 10 gallon, one in a 5
    .9) Did you use peat pucks (or similar) to root clones or germinate seedlings? clones came in foam like squares?

    Your nutrients and water:
    10) Source of water? (tap, bottled or filtered) What's it's ph before adjusting? Tap or out of brita filter. no pH tools
    11) Method of checking water ph. (ph pen, test strips, aquarium test kit...)
    12) Method of adjusting water ph. (phosphoric acid, white vinegar, hydrated lime, PH Up...)
    13) Specific brand and N-P-K ratio for each bottle. List dosages (quantity per gallon) and current feeding schedule. Have yet to add fertilizer
    14) How often are you watering between feedings, and how much per watering?
    15) Any additives or tea's? (Superthrive, CalMag, molasses, Mother's Earth...)
    16) Are your ph levels stable, or do they fluctuate?
    17) What is your ingoing water's ph? ...your runoff ph?
    18) Do you foliar feed? If so, with what, how often, and at what time do you spray?

    Your growroom:
    19) Indoors or outdoors? Indoors, basement
    20) What size of closet, room or hut? its a lean-to hut i guess.. very compact but can grow with the plants
    21) What are the temps and humidity levels while lights are on? ...With lights off? 60-70ish not sure. nothing extreme
    22) Have you seen signs of insects in the growroom? None

    Your strain:
    23) What strain are you growing? (Indica dominate or Sativa dom?)uhh, trainwreck and aloha?
    24) From seeds or clones?Clones
    25) Is this an autoflower strain? no clue
  8. stinkyattic

    stinkyattic CultiModerVatorAtor

    There's no tip-burn apparent in the pics. It's not a straight nute burn; rather, it looks like you're locking out calcium and/or potassium. Usual reasons for this are soil that is too wet, too cold, or of too-low pH. If you used a peat-based medium to begin with, as most are, and the plants have been in there a while (like more than a couple months) it's quite likely that the lime is used up and the plants have lost their calcium source and the soil has lost its acid-buffering capacity. Check the pH of the runoff. It's likely low.

    On the up side, most of the leaves look great. You may just need to re-pot up to a slightly larger container with some fresh soil. If the soil pH tests low, you'd be well advised to flush it back up to 6.8-7 and stabilize it before repotting. If you're going to do that, wait until the soil dries back out pretty well before actually doing the re-pot.
    • Like Like x 2
  9. MJking

    MJking Registered

    Well the plants are only about a 7 weeks old. I re-potted and flushed; pH is good. Do I need to get them on some nutes? How do I overcome lockout?
  10. WashougalWonder

    WashougalWonder Registered+

    This makes MG sound like bad stuff. (I wont use it but read on) MG and other mfg of potting mixes are made for the whole world of horticulturalists. They load up the nutes. They many times do not get it mixed well and it burns like in the above pictures.

    Ocean Forest seems to have picked a market for cannabis. The mix I get is perfect for my environment and I essentially do not give nutes. The OF has plenty of nutes, and just repotting is like fertilizing. I guess I do add some carbs into the diet in the last 2 weeks, but other than that I use no nutes unless I am willing to risk burn.

    I CONSTANTLY see threads about a poor little 3 week old seedling/clone that is going to get hammered with nutes and then they ask what is wrong. The above picture is nute burn, with lockout of P and Ca, maybe Mg too.

    I would like to know though, does Fox Farms make the mix for a general climate? For example I am in the Pacific NW and a very moist climate, Rusty is in Arizona and a very dry climate.....does his OF have less vermiculite that the mix I get? In other words do they climatize the mix for the general shipping area. I doubt seriously my OF is shipped from the same place Rusty's is. Hmmmm maybe new thread?
  11. Rusty Trichome

    Rusty Trichome Registered+

    Ya did fine. :thumbsup:

    I'd ditch the foil. Reflects not only light, but heat. With 10 CFL's doubtful you want heat retention.
    Plus, CFL's light isn't strong enough for the effective light to go from the bulb, bounce off of the foil, and get back to the plant. Not at all worth the time or effort to use foil or Mylar. Flat white paint does just as good, for what it's worth.

    Don't switch back-n-forth. Whichever you chose, stick with it. (I use 18/6 because it works)

    Neither composts are for container gardening, are they? The mushroom compost around here is buffered to 6.0 ph or so. Way too low for container cannabis. And adding cow manure compost likely compounds that issue.

    If you want success, there are a few toys you'll need to pick-up. A way to check your water ph is definatelly one of them.

    Going to need to get some. A good 3 part nutrient system will take you from seedling to harvest. Most come with a weekly feeding schedule online, making it so easy a caveman can do it.

    Perhaps regions alter their formula's a tad, but they would rather you adjust to suit your needs. It's a "we have an ammendment for everything" world now, and marketed as such.

    I use Filthy Rich by Dr. Q. ..and if that's unavailable I go with the Miracle Grow regular old potting mix. I add perlite to both. More perlite in the winter when humidity is higher here, less perlite when it's hot and I need that moisture retention :jointsmile:

    Hi Stinky. Been a while.

    There are of course, many different brands and types of container mediums, and any you decide upon will take some getting used to. One without time release nutrients is easier to adapt to, but it's all good.
  12. SupraSPL

    SupraSPL Registered

    Hey Stinkyattic glad to see you around I thought you had disappeared. I sent you an email/book sorry!

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