Continuous yellowing and can't figure out why!

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Mojave

Well-Known Member
I've got a few years under my belt. But I'm stumped and frustrated. I had my previous grows dialed in great in a whole room. Now in a 4x4 tent. Previously I used CMH very successfully.

Clones started very healthy and were a perfect green. 5 or1 0 gallon (can't remember) I had lowered the (new to me) Leds I recently got. The big aluminum board kind. Left them alone for a few days and noticed they were yellowing, so I figured oops.. More light than they could use in Veg along with cooler temps from winter.

I raised the lights all the way up. And dialed them back. And it's been 2 or 3 weeks now. And these guys don't show any proper new green growth. Plants on the left (Gelato 45) are praying though.. The one on the right is finicky i know from previous grows (star pupil). And I know can have nitrogen issues with low leaf temp, and likes complete dryness between waterings (per the breeder) the small dark green clone (velvet bud) i know has had too much nitrogen from a few doses of Neptune's harvest fish/seaweed fertilizer.

The soil in the 2 large plants is organic/amended stuff. Been using it for years. My mother plant outside the tent is perfectly healthy and green, in a container that's like 2 gallons.. And gets ambient light from a cmh.. Temp in the tent during the day is 70, down to 60 at night. Hard to keep heat up with leds. (but again the plants outside the tent are fine) And if I turn off the small exhaust fan I feel not enough air exchange is occurring. I tried a few waterings with the Neptune's to see if they'd green back up but nope.. And doesn't make sense since the bottom growth is still lush green. They get tap water that i pour into the plastic containers and wick up through the fabric pots. Stems looks little odd. Dunno out of ideas. The bottom growth is still the original nice green color. But everything on top is crap.

First pic is sideways sorry, Far left is Gelato and on the farthest right is the mother i pushed into the Pic to show its PERFECT COLOR
 

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pulpoinspace

pulpoinspace

Well-Known Member
Mojave said:
Neptune's harvest fish/seaweed fertilizer.

The soil in the 2 large plants is organic/amended stuff. Been using it for years. I tried a few waterings with the Neptune's to see if they'd green back up but nope..
Click to expand...
So you've been using this soil without additional fertilizer for years and have not ran into this problem? the plants look underfed and out of pH balance but that shouldn't be an issue with a living organic soil. it looks like low of pH or nutrient deficiency but impossible to say without knowing more about the medium. if the medium has been used to grow cannabis without issue for years then I dunno either.
 
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Mojave

Well-Known Member
DaFreak said:
I'd back off and add a little Epsom and recalibrate your pens if you use them.
Click to expand...

I do have some epsom, and garden lime. What pens are you speaking of? I have a ph meter somewhere, but with the organic soil I've never needed it. And back off of what exactly?

*soul dwella* Uh i forget the brand I'll check, but they were at 18". Now i have them at about 3ft and turned down. I bought them on a whim off Amazon when a CMH died under warranty. I'm thinking of switching to a cmh in there to see if it'll get the temps up. I did use these leds at the end of summer with no issues into flower and they were great. But temps were 75f at night and 85 during the day.

I also forgot to add that i had my cloner in there recently. And my clones started gettin fried too. Moved them outside the tent. And they're 8 to 10 ft from the cmh. And they've turned green and healthy again.

*pulpoinspace* i was thinking underfed too.. But that doesn't track since the small velvet bud is dark green. And i top dressed heavily on the large plants. And the fact the unde growth is still nice and green not nitrogen starved and yellow.

The plants are going to get too big at this point once I'm able to flower...so I'm on the fence about doing a heavy trim/topping them down a few inches. I wish i had a par meter.. I'm thinking the cool air and leaf temps are a factor and it's throwing them off big time. Keeping them watered has been a chore as the humidity is about 20% down there.

Thank you guys big time for the quick replys
 
D

DankBucket

Member
Mojave said:
I've got a few years under my belt. But I'm stumped and frustrated. I had my previous grows dialed in great in a whole room. Now in a 4x4 tent. Previously I used CMH very successfully.

Clones started very healthy and were a perfect green. 5 or1 0 gallon (can't remember) I had lowered the (new to me) Leds I recently got. The big aluminum board kind. Left them alone for a few days and noticed they were yellowing, so I figured oops.. More light than they could use in Veg along with cooler temps from winter.

I raised the lights all the way up. And dialed them back. And it's been 2 or 3 weeks now. And these guys don't show any proper new green growth. Plants on the left (Gelato 45) are praying though.. The one on the right is finicky i know from previous grows (star pupil). And I know can have nitrogen issues with low leaf temp, and likes complete dryness between waterings (per the breeder) the small dark green clone (velvet bud) i know has had too much nitrogen from a few doses of Neptune's harvest fish/seaweed fertilizer.

The soil in the 2 large plants is organic/amended stuff. Been using it for years. My mother plant outside the tent is perfectly healthy and green, in a container that's like 2 gallons.. And gets ambient light from a cmh.. Temp in the tent during the day is 70, down to 60 at night. Hard to keep heat up with leds. (but again the plants outside the tent are fine) And if I turn off the small exhaust fan I feel not enough air exchange is occurring. I tried a few waterings with the Neptune's to see if they'd green back up but nope.. And doesn't make sense since the bottom growth is still lush green. They get tap water that i pour into the plastic containers and wick up through the fabric pots. Stems looks little odd. Dunno out of ideas. The bottom growth is still the original nice green color. But everything on top is crap.

First pic is sideways sorry, Far left is Gelato and on the farthest right is the mother i pushed into the Pic to show its PERFECT COLOR
Click to expand...
Your plants seem to be massive for the pots they are in, what size? You also have wayyyyyyyy to much leaf on your plant. And small branches but thats my opinion.
 

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M

Mojave

Well-Known Member
DankBucket said:
Your plants seem to be massive for the pots they are in, what size? You also have wayyyyyyyy to much leaf on your plant. And small branches but thats my opinion.
Click to expand...

Heh, i think 10 gallon pots. But the left plant is actually 3 clones. The right is just one plant. Those are small to me. In the 25 gallon planter i flowered one plant with a trellis. And it was over 60" wide and 48" deep, and about 48"high.

I was waiting till 2 weeks into flower to defoliate. Just low stress trained so far.
 
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Destroyer of chairs

Well-Known Member
I just had a problem with yellowing. Last couple days something was up and yellowing coming on fast on one of them. Turnes out my fat ass(or fingers) must have accidentally pressed a button on one of my timers, resulting in one row of lights being on 24/7.. What I'm trying to say is, check ur gear as well! Only luck made me notice it. Freakin timers..
 
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DaFreak

Well-Known Member
When I say back off I mean back off your nutrients and add some mg so you're not just adding to your total but I didn't notice that you're using just organics. You could do a foliar spray with it then. dish soap and a little mg. My guess would be as stated above by another user, your plants are hungrier for mg because of the LEDs than before.
 
Rurumo

Rurumo

Well-Known Member
What model of light is it exactly, maybe you said and I just missed it, also, how close was it at it's closest? It sounds like you light burned them which stunted their growth. Also, what distance is the light now? Nothing will stunt a plant's growth like light burning them, but they'll usually snap out of it in a week or two once the roots fill out. It's actually really easy to light burn plants with LEDs because you hear people talking about how close their lights are here and follow their lead but without actually allowing your plants to gradually get used to it.
 
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Monster762

Member
Mojave said:
I've got a few years under my belt. But I'm stumped and frustrated. I had my previous grows dialed in great in a whole room. Now in a 4x4 tent. Previously I used CMH very successfully.

Clones started very healthy and were a perfect green. 5 or1 0 gallon (can't remember) I had lowered the (new to me) Leds I recently got. The big aluminum board kind. Left them alone for a few days and noticed they were yellowing, so I figured oops.. More light than they could use in Veg along with cooler temps from winter.

I raised the lights all the way up. And dialed them back. And it's been 2 or 3 weeks now. And these guys don't show any proper new green growth. Plants on the left (Gelato 45) are praying though.. The one on the right is finicky i know from previous grows (star pupil). And I know can have nitrogen issues with low leaf temp, and likes complete dryness between waterings (per the breeder) the small dark green clone (velvet bud) i know has had too much nitrogen from a few doses of Neptune's harvest fish/seaweed fertilizer.

The soil in the 2 large plants is organic/amended stuff. Been using it for years. My mother plant outside the tent is perfectly healthy and green, in a container that's like 2 gallons.. And gets ambient light from a cmh.. Temp in the tent during the day is 70, down to 60 at night. Hard to keep heat up with leds. (but again the plants outside the tent are fine) And if I turn off the small exhaust fan I feel not enough air exchange is occurring. I tried a few waterings with the Neptune's to see if they'd green back up but nope.. And doesn't make sense since the bottom growth is still lush green. They get tap water that i pour into the plastic containers and wick up through the fabric pots. Stems looks little odd. Dunno out of ideas. The bottom growth is still the original nice green color. But everything on top is crap.

First pic is sideways sorry, Far left is Gelato and on the farthest right is the mother i pushed into the Pic to show its PERFECT COLOR
Click to expand...
Mag, potasium. Week what again ? Epsom and bloom booster with high k
 
M

Monster762

Member
Capn-Crunch said:
Have you always done the "wick up" watering method? A friend tried that and had a minor root rot issue. It does look like you need a bit more Mg as well.
Click to expand...
Is this how watering being done? Water in from top unless gnats bugs or something forces bottom watering. The theory here is as you water from top you force oxygen in the soil. Does not apply to bottom feeding. No o2 no thriving
 
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Monster762

Member
Monster762 said:
Is this how watering being done? Water in from top unless gnats bugs or something forces bottom watering. The theory here is as you water from top you force oxygen in the soil. Does not apply to bottom feeding. No o2 no thriving
Click to expand...
This is why small pots multiple feeds daily grow so fast. The added inputs exchange o2 under the surface more frequently.
 
M

Mojave

Well-Known Member
I've had multiple clones in pots like this before, and watered them from the bottom. Then allowing them to wick up through the pots with zero issues. I only really water from the top when i give them a organic tea or boost of something like the Neptune's harvest, which I have a bloom version of as well.

The only difference between this grow and the last is the average temps in the tent.

The previous was grow in this setup was nearly identical. But was 2 pots with 3 velvet bud clones in each one. And were about the same size. I'll try some Mg/Epsom/bloom. And I'm going to crank the heat up by sticking a small space heater in there.

I'm looking for the light brand now and will post a pic of them. I know leds cause can issues because they're so efficient and don't emit any heat which causes low leaf/plant temp so they aren't able to synthesize all that light without some warmth. I'm thinking that's another part of the problem.

I always forget to mention that i have moderate to severe red /green color blindness. Which makes diagnosing problems and deficiencies extra fun
 
Last edited:
getogrow

getogrow

Well-Known Member
Yes , im going to assume way too much light in that low of temps. 70 is really low for daytime. it will work but that might be why a coulple of strains are showing it more then the other.
The one is a beautiful looking sativa. im sure it would LOVE the higher temps. (im not even sure its sativa but its so textbook looking sativa....beautiful if you ask me)
They are either starving or sunburnt or both. Raise the light up a foot or two till they come out of it....then slowly lower it back down. Whatever it is , you have to address it fast or it will fuck ya.
The only other option is a lockout of almost all nutes and i dont see that in your situation.


soil :joint:
 
M

Mojave

Well-Known Member
getogrow said:
Yes , im going to assume way too much light in that low of temps. 70 is really low for daytime. it will work but that might be why a coulple of strains are showing it more then the other.
The one is a beautiful looking sativa. im sure it would LOVE the higher temps. (im not even sure its sativa but its so textbook looking sativa....beautiful if you ask me)
They are either starving or sunburnt or both. Raise the light up a foot or two till they come out of it....then slowly lower it back down. Whatever it is , you have to address it fast or it will fuck ya.
The only other option is a lockout of almost all nutes and i dont see that in your situation.


soil :joint:
Click to expand...
This is what I'm thinking too, and yes that gelato 45 (the one I assume you're referring to) with the thin Sativa leaves WAS very pretty. I like the structure on it. I'm gonna grab some clones off the bottom that are still nice and green and get those going while letting these recover.
 
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