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Sick plants-----Stumped Grower????

Discussion in 'Marijuana Plant Problems' started by Big leave, Jan 18, 2013.

    Big leave

    Big leave Member

    Hello every, and thanks advance!

    so i am having some problems with just some of my flowering plants. 4 out of 10.

    i am fairly new to growing,

    i have 12x12x10 flower room. 4 1k watt Raptor XXXL lights. the room is painted with the reflective paint to give the best light i can. i have a wall AC unit but it is turned off due to the low temps around here. 30 to 40% perc. humidity. couple of wall fans and no Co2 because the Temp switches will kick on bringing in cool fresh air to regulate the high temps. temps did get low about 15 days ago. they were 55-65 deg. in the dark and 78-80deg in the light. the temps worried me so we installed a heater and more temp switches. now were good, around 78-80 in the day and 68 to 70 @ night.

    Plants: all are in soil.
    I have 4 plants in training rails with trellis netting and all trimmed and trained with 64 tops. these have been in the 15 gall pots for 4 months. they were beautiful. the rest (6) are in 5 gall pots and have been for 2 months. these are tall lollie popped and topped.

    15 days ago i mixed up 25 gall as usually (this was week 2 in flower). all plants were perfect!! but this is when the temps dipped low.

    I think my problems started here.
    for this many plants in normal temps this would be normal so i fallowed my procedure.
    mixed the House and garden nutrients in 25 gall of water. the 4 plants in training rails have lots of drainage. the rest sit in saucers on the floor. watered 10 plants with 25 gall evenly. i would water when plants are light and soil is dry.
    the six non-trained plants would sit in water for a few hours after then it would be absorbed by the soil. the 4 would drain all excess immediately.

    i then checked in 2 days later and the 4 plants looked sad and droopy. soil was dry and ready for water but i was concerned so i cut back on how much i soaked these ones. about 1.5 literes ea.

    2 days later they looked worse, more droopy and leaves were pointing down...... all the others were perfect and Ragging. already had fist sized colas @ week 3 in flower. but the sickies have penny sized nuggs...

    i waited to water the (4) Ill plants for 6 days till the soil was very light. i was trying to avoid root rot. now theres some yellowing going on with the big leaves. no more nugg growth. again all others are beautiful.
    i watered 1.5 liters of water with nutes to the sick plants and i have seen nothing but deterioration.

    i dont know whats going on... these 4 are not looking good. last harvest (same procedure) each plant made 1.6 lbs avg per plant. i dont think i will see half that ....

    i was thinking hydrogen peroxide??? re pot??? did the cold temps piss them off???

    here are some pics, not very good though. theres more yellowing than the cam would get as i used the flash in the dark.

    any input would be much appreciated!

    photo.JPG photo 4.JPG photo 3.JPG photo 2.JPG
    hotrodharley likes this.

    Ninjabowler Well-Known Member

    Tuff to say, everything sounds good. Have you checked the ph of the runoff from the sick ones and compared it to the healthy ones?
    it kinda looks like over watering to me but its hard to say. Check the smell of the run off maybe, possibly root rot? You make sure to check for bugs and eggs really good? I dont think i can help you on this one but good luck man.

    gagekko Well-Known Member

    I don't see any fans circulating the air.

    Krondizzel New Member

    You never mentioned a thing about your PH. Soil varies. So... are you used to the soil and amendments you are using? Checking the water? Runoff?
    Bakatare666 likes this.

    Krondizzel New Member

    I would say this guy is onto something. Props Ninja.

    robert030188 Well-Known Member

    Nevermind kron diffrent thread said 5.8...not sure what he's running

    drolove Well-Known Member

    thinking PH, watering issue, or maybe even over fertilized?? leafs are pretty dark green.

    robert030188 Well-Known Member

    We will need PH information before a diagnosis can be made...still too many variables to pin point the problem

    ynkessuck247 Active Member

    p.h all day. just look how over shinny the leaves are, thats the first sign of p.h imbalance. It will almost look waxy and confirm this by checking to see if the leaves have become thinner.

    Also watch out on how you are leaching your pots. Its not the best idea to let the pots reabsorb the water that has leached into the saucer. THis forces the plant to uptake excess salts which will lead to a low p.H and yellowing.
    Big leave

    Big leave Member

    I usualy calibrate my PH meter weekly, and always feed the plants with 6.3-6.4.
    I havent checked the run off, i was first trying to let them dry out... Should i flush the plants that are sick with ballanced water then check the run off PH?
    since this is a new problem to me, i have never heard of the water having any odor. will it smell mildewy

    Acutaly just at the time i flipped i had Spider mite infestation. i quickly used Avid. worked great and complelty removed the little bugs before the end of week two. the bugs were on all my plants so i am sure if that could have anything to do with the sickies....
    Big leave

    Big leave Member

    Sorry i should have shown them. i have 2 wall fans on all the time. and theres a charcaol filter with a fan on top than runs every half hour for a half hour
    Big leave

    Big leave Member

    i will check my run off tonight, I usualy calibrate my PH meter weekly, and always feed the plants with 6.3-6.4.

    my soil is the 707 brand. Ingredients: Coarse peat, coco fiber, compost, perlite, pumice, worm castings, bat guano, fish bone meal, soybean meal, feather meal and kelp meal

    i fallow the "House and garden" line of nutrients to the T
    Big leave

    Big leave Member

    I will try to post better pics too, these dont show the full severity of the yellowing.

    hotrodharley Well-Known Member

    Fans run intermittently? They should be on 24/7 moving air at the very least and some on the plants as well. Get the air moving and a lot of it.
    Big leave

    Big leave Member

    yea the wall fans are 24/7. just the fan attached to the charcoal filter is intermitten
    Canna Connoiseur

    Canna Connoiseur Active Member

    I see a nutrient burn on one of these in pic 3. Some yellowing and falling off leaves is normal. All leafs should be pointing up though. Can anyone confirm the nute burn for me?

    hotrodharley Well-Known Member

    Honestly the pics look like overwater and heat stress. And I did read all the OP posts about his water routines. Still appears overwatered but damned good job up to this point. Damned good job with +rep for this new grower.

    GreenThumbSucker Well-Known Member

    You dont want them sitting in trays of water. The runoff should run strait out of the pots. They look a little over watered. Give them a little hydrogen peroxide. They look reasonably healthy otherwise. Might want to drop the PH a little, maybe down to the high 5s.

    Bugs? Go onto ebay and get some Forbid 4f. 1 ml makes a whole gallon and one spraying cures your problem. With Avid, they will come back because it doesn't kill the eggs. You only have to spray it once per crop and it kills for 6 weeks AND you only have to spray it on top of the leaves.

    Get Forbid 4f Here

    Forbid is strong stuff and you CANNOT USE IT DURING FLOWERING. You will have to wait til next crop is vegetating before you can use it, but I tell you this. It will save you months or years of pain and save many crops. Mites are a motherfucker to get rid of once you have them.
    sheik yerbouti

    sheik yerbouti Active Member

    Definitely sounds like the cold temps led to the plants sitting in stagnant water too long causing droop. If I read correctly the plants with the proper drainage are fine but the plants with the poor drainage are the ones that are drooping? Tough to say how to remedy that if they have slowed growth, I know from my experiences that a really shocked plant can take a good week to recover and in the mean time your stressing out trying out a million different remedies potentially stressing out an already stressed plant cause more damage.

    If its definitely the plants with the poor drainage I would try just keeping them happy with the right amount of watering with no nutes or low strength, not watering till runoff just enough to get the medium moist and hope they recover, I have heard of guys using H2O2 to revive plants that the root zone has been starved of oxygen, I'm unsure of the rate of application though.

    That's my best guess hope it helps, I recently had some low night temps and my plants took a long time to drink the water and showed some signs of drooping. Once I got the temps up they were fine. Problem is that if your plants are low on the ground the cold air sits there and creates an even colder root zone when your temps dip.

    Also your plants look almost too green with a little nute burn so I'd give a watering with just h20 next and then scale back the nutrients a touch.

    best of luck!

    puffdatchronic Well-Known Member

    I thought some kush plants looked like that anyway ..pointed down the way..this is the pic of og kush on dnas website


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