HELP Deformed, yellowing burnt new growth and holes in leaves

okay well im going to make this thorough because this problem is occuring on pretty much all my plants. they're about 6-7 weeks into vegetation(about 2' to 2.5' in hieght), i'm using a 400 watt and a 240 watt in about 48 cubic feet(maybe 15 squared feet) ave. temp 97 -103 deg ave humidity 60 % everything was going fine.

about two days before the problem occured i had stopped feeding my plants nut because i though i might have been over feeding them. a day before the problem occured i gave them a pretty concentrated epsom foliar spray. that day i also watered them and left enough water in the trays it lasted for most of the day

my friend brought it to my attention that i should not have excess water sitting in the plants for that long and that i might have a fungus problem. the thing is that the whole time they have been growing i've let them sit with water in their trays.

the new growth is curling, dying, necrotic, looks possibly like i sprayed a chemical on it but it only appears on the new growth.

before this massive death that's overtaking my babies, there has been little holes appearing in the leaves. i dont think there are any bugs in the room.

here's the pictures I don’t know if the problem is getting worse

I made the over watering mistake too. I'm on my first grow also. let your soil really (really) get dry before you water again. Its kinda like a first time mother who over protects her newborn. be sure to have real good ventilation...your grow area seems too hot to me. over watering will not have much adverse affect in the early stages of veg, at least, it didn't for me. as for the little holes...sounds/looks like bug work to me, however, I did do the same thing to one leaf when I was feeling the frond, a rough patch on the edge of my finger. anyway, thats just my opinion. good luck.

too hot IMO

400 and 250 watt what? HPS or MH? And how close is the light to the plant, it should be around a foot if not more if your using something like a HPS. And HOLY CRAP 97-103, Get a fan in that bitch. Also it looks like your spraying your plants a lot, you should stop cause that can cause burns on the leaves also.

Aesop said:

400 and 250 watt what? HPS or MH? And how close is the light to the plant, it should be around a foot if not more if your using something like a HPS. And HOLY CRAP 97-103, Get a fan in that bitch. Also it looks like your spraying your plants a lot, you should stop cause that can cause burns on the leaves also.

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400 w mh and a 240 w hps i believe. they're about a foot a foot and a half away. i've got 3 fans already

onenumcat said:

I made the over watering mistake too. I'm on my first grow also. let your soil really (really) get dry before you water again. Its kinda like a first time mother who over protects her newborn. be sure to have real good ventilation...your grow area seems too hot to me. over watering will not have much adverse affect in the early stages of veg, at least, it didn't for me. as for the little holes...sounds/looks like bug work to me, however, I did do the same thing to one leaf when I was feeling the frond, a rough patch on the edge of my finger. anyway, thats just my opinion. good luck.

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im pretty sure i dont have bugs. thanks for the help though

way way way to hot....
6-7 weeks should be much bigger.... 2.5 inches???

JonnyBtreed said:

way way way to hot....
6-7 weeks should be much bigger.... 2.5 inches???

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2.5 feet my bad

gotot said:

2.5 feet my bad

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you did put a ' foot symbol, not a " inch symbol...he bad.

First off, your temperature is WAAYY too high. get it down to around 75 F.

STOP FEEDING ANYTHING NOW!!! Water with nothing except maybe some molasses, and either Superthrive or Super Plant Tonic. Pics 2, 6, and 7 show classic examples of nute burn. Yellowing brittle leaf margins (edges). Here is a pic of one of my nute burnt plants from last grow:



See the similarities? If you're using chemical nutes, back off the concentration. If the directions call for 1 tbsp, use 1/4 tbsp, but in NO case use more than 1/2. I managed to kill off almost my entire first grow, and drastically reduced the yield of the one survivor, from over attentiveness. Killed the poor bastards with love!!!

I also see skinny leaves on your plant there, tlp. That's a sign of heat stress, without knowing more about how it expresses (seriously reduced growth, burning, canoing of leaves, skinny leaves), I theorize that it may reduce surface area (reduces heat absorption, think of desert plants) and increase air flow as a response.

They looked burned, physically by heat and light, and physiologically by nutrients. Yellowing can also be a sign of over-fertilization, and your plants also have very shiny (too shiny), dark green leaves. The humidity, coupled with that heat, is problematic as the plants mature. Fans blowing do not equal ventilation, they just equal hot air blowing around. You must ventilate, meaning exhaust the hot air out, and if it's being exhausted in enough volume and you have sufficient passive intakes, negative pressure will bring in cooler air just fine. But, they just look too hot.

I recommend ANYTHING with mycorrhizae (and other soil microbes) over Superthrive. But, when you begin using anything with them you really want to bring down your fertilization schedule. Google mycorrhizae.

Seamaiden said:

I also see skinny leaves on your plant there, tlp. That's a sign of heat stress, without knowing more about how it expresses (seriously reduced growth, burning, canoing of leaves, skinny leaves), I theorize that it may reduce surface area (reduces heat absorption, think of desert plants) and increase air flow as a response.

They looked burned, physically by heat and light, and physiologically by nutrients. Yellowing can also be a sign of over-fertilization, and your plants also have very shiny (too shiny), dark green leaves. The humidity, coupled with that heat, is problematic as the plants mature. Fans blowing do not equal ventilation, they just equal hot air blowing around. You must ventilate, meaning exhaust the hot air out, and if it's being exhausted in enough volume and you have sufficient passive intakes, negative pressure will bring in cooler air just fine. But, they just look too hot.

I recommend ANYTHING with mycorrhizae (and other soil microbes) over Superthrive. But, when you begin using anything with them you really want to bring down your fertilization schedule. Google mycorrhizae.

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everything that you just said,(seriously reduced growth, burning, canoing of leaves, skinny leaves) is exactly what's happening all the new growth basically stopped for the past 3 days since the incidentmakes me sick... i still dont know what u mean anything with fungus root(mycorrhazae). where can i get fungus from? explain please

Google mycorrhizal Fungi, or just mycorrhizae. The are microorganisms that live symbiotically in the root system. They are instrumental in nutrition uptake by the plant, and a host of other benefits, too many to list.
You can get them online, or Home Depot carries a product called Myco-Stim.
BioTone Starter Plus also contains mycorrhizae. They'll make a world of difference in the growth rate and development of your plants

I did include a link on mycorrhizae for ya. There are a lot of products that are now pretty easily available at garden centers and the like that have not only mycorrhizae but other beneficial soil microbes as well. Three products that I have used are Super Plant Tonic, by Blue Mountain Organics (only found on Ebay as far as I know) is a liquid "supplement" and is not quite an actual fertilizer; Dr. Earth Organic 5, which is their tomato and vegetable pre-mixed fertilizer; Happy Frog by Fox Farms Japanese Maple, which is for acid-loving plants and what I used for flowering as a top-dressing.

Seamaiden said:

I did include a link on mycorrhizae for ya. There are a lot of products that are now pretty easily available at garden centers and the like that have not only mycorrhizae but other beneficial soil microbes as well. Three products that I have used are Super Plant Tonic, by Blue Mountain Organics (only found on Ebay as far as I know) is a liquid "supplement" and is not quite an actual fertilizer; Dr. Earth Organic 5, which is their tomato and vegetable pre-mixed fertilizer; Happy Frog by Fox Farms Japanese Maple, which is for acid-loving plants and what I used for flowering as a top-dressing.

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k i'll look into it, thanks

Be sure to check the images tab for Google. The research that's gone into soil microbes is just amazing, and the "before and after" type images...? Well, let's just say it convinced me. I now also use leftovers from my Mary growing efforts in the front "garden" areas (it's all been left pretty natural) and it's turning the rocky clay into soil, getting worms (FAT nightcrawlers!), and my redwood and incense cedars, WOW!

stress aint too bad. better watch for herms. my dog walked over one of mine kinking teh main stem,then i over nuted,then HERMED. the rest are fine though.

Like everyone has said already, WAAAAAAY too hot! Cannibis is actually a mountain plant, that's used to cool weather, not hot. Second, your lights are too close to the plants. A 400 watt HPS, should be no closer than 3-4 feet. Third, NEVER let your plants sit in the drain water. The water that comes out, is nute excess salts. You didn't mention what type of medium you were growing in.

Oh.. yeah, this post actually reminds me, if I didn't say it before, you're going to have to be REALLY careful with fertilizer once you dose with the microbes. One of the things they do as Tiny Agents of Chelation is make nutrients far more "bio-available". This makes it even easier to burn your plants if you're not careful. Flush FIRST, for sure, then begin again, giving everything ample time to show results from any one treatment.