Serious yellowing

This plant seems determined to bloom. It's purple kush and is not supposed to be an auto flower.


It's yellowing and dropping fan leaves at a now alarming rate.

Initially I was feeding it wrong, so it might have had nutrient lockout... But I've since corrected that and it seems to be yellowing faster.

The other plant is also yellowing, but much slower.


I give them 12ml of TNT Grow formula per 2L of water, with 2ml of calmag.
I feed them at every water, which is about every 3-5 days I think.... when the planter is light and the leaves begin to droop.
They get 18 hours of light under a 600w led panel, and 8 6500k CFL bulbs.

My guess is they still need more nutrients....



Suggestions!?

Im switching the larger of the two plants to bloom on Dec 1st anyway..
I think the first is big enough.

Looks like nitrogen deficiency
Could end up with lack luster yields if you don't fix before flowering.

SH420

they look pretty big. are you going to do a transplant to a larger pot before you flip to flower. how many gallons is that pot?

shrxhky420 said:

Looks like nitrogen deficiency
Could end up with lack luster yields if you don't fix before flowering.

SH420

Click to expand...

That's what I thought too. How much should I be feeding?
Is there a math formula for how much nutrient to increase by?

pulpoinspace said:

they look pretty big. are you going to do a transplant to a larger pot before you flip to flower. how many gallons is that pot?

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The bigger one is about 3ft from floor to tip. Planter is about a 10" tall.

I don't know how many gallons. It's 7 liters. (2 gallon?) I wasn't gonna transplant it... Should I? I don't really have a lot of space.

I'm getting a bloom tent, soon as they're back in stock, that will be a foot taller to have room for bloom growth.

ShitakeShroom said:

That's what I thought too. How much should I be feeding?
Is there a math formula for how much nutrient to increase by?



The bigger one is about 3ft from floor to tip. Planter is about a 10" tall.

I don't know how many gallons. It's 7 liters. (2 gallon?) I wasn't gonna transplant it... Should I? I don't really have a lot of space.

I'm getting a bloom tent, soon as they're back in stock, that will be a foot taller to have room for bloom growth.

Click to expand...

Yeah I would recommend a 5-7 gal fabric pot to flower in. Those plants are pretty big for less than 2 gal. Roots might be wrapping.

pulpoinspace said:

Yeah I would recommend a 5-7 gal fabric pot to flower in. Those plants are pretty big for less than 2 gal. Roots might be wrapping.

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5-7?! That's insane!! I don't think I have the height in the tents for pots that big....
I thought it was a ft of height per gallon of pot..

Definitely hungry and probably root bound. Pots are too small for plants that size. If you're running out of headroom, it's time to learn some training techniques.

ShitakeShroom said:

5-7?! That's insane!! I don't think I have the height in the tents for pots that big....
I thought it was a ft of height per gallon of pot..

Click to expand...

sounds about right. although height isn't a great measure. you're at 2.5 feet now. plants usually double in size in flower. so you'll have 5 feet tall final plants. i recommend 5 gallon. you can get containers that are shorter and more stout.

https://www.amazon.com/Smart-Pots-5-Gallon-Soft-Sided-Container/dp/B002JUOWB2

or

https://www.amazon.com/247Garden-5-Pack-Gallon-Aeration-Handles/dp/B013JM3JSA/ref=sr_1_4?s=lawn-garden&ie=UTF8&qid=1542078595&sr=1-4&keywords=5+gal+smart+pots

if your running out of vertical space, supercrop your tallest branches and add a trellis (Scrog) to hold them down and create a horizontal canopy.

"Initially I was feeding it wrong, so it might have had nutrient lockout"

..explain that statement; Talk about your medium and your pH

GBAUTO said:

Definitely hungry and probably root bound. Pots are too small for plants that size. If you're running out of headroom, it's time to learn some training techniques.

Click to expand...

I've been doing training, but I don't know what to do at this point.

I grew the first 3 sets of nodes, then cut the main stem.
The 6 nodes grew.
I clipped each of those, after they grew about 3 sets each.

They didn't all grow equally like I had expected. And every time I cut the new growths are much thinner than the last. Buds won't grow as big.. Right?

I have a choice.. I either cut the tall ones shorter, or try bending them so the canopy is more even.

My 2nd plant I only cut the main stem after it had 4 sets of nodes, and didn't touch it again. It has 8 thick tall stalks.

Beachwalker said:

"Initially I was feeding it wrong, so it might have had nutrient lockout"

..explain that statement; Talk about your medium and your pH

Click to expand...

Medium is peat moss, perilite, dolomite lime, more or less. I'm not exactly sure. Got it from the "magic crops" shop. It's clean, nutrient free, customized for weed so I'm told.

So feeding wrong.... I was adjusting pH of my tap water from 7.8 to 6.0
Then adding nutrients and calmag. I didn't know the nutes lowered pH as well.
I was feeding probably around 3 pH.. ..

Look up supercropping and scrogging you could use them both.

You would pinch the tall stems at around the height you want to put the trellis and lay them down. Then put the trellis over them and they will recover and grow up through it.

ShitakeShroom said:

Medium is peat moss, perilite, dolomite lime, more or less. I'm not exactly sure. Got it from the "magic crops" shop. It's clean, nutrient free, customized for weed so I'm told.

So feeding wrong.... I was adjusting pH of my tap water from 7.8 to 6.0
Then adding nutrients and calmag. I didn't know the nutes lowered pH as well.
I was feeding probably around 3 pH.. ..

Click to expand...

I remember you now mushroom from the other thread about this issue with the feed! My guess is the damage that was done with the extremely low ph is just now starting to drop off, make sure you maintain your pH properly to prevent this condition going forward. I do not know your growing medium very well but now that you've defined it hopefully others who are familiar with it will be able to assist you better

Also what you said in your first post about needing more nutrients, I do not believe is correct, your plants look very green on the new growth but the old leaves are going to die anyway mushroom, you can not stop that but I think looks in pretty good condition aside from the dying leaves, your stems are very purple but it may be the strain

Regarding pot size I use 3 gallon pots with no problem, 5 gallon is also good, I believe you can finish your run in those pots but in the future you might want to keep those for veg, then go to something bigger for bloom. For example I go from small 2-inch containers for seedlings to 6-inch containers for up to a month (sometimes even longer if there is no room) to 3 gallon size for the main veg period and also thru flower, good luck mushroom!

ShitakeShroom said:

I've been doing training, but I don't know what to do at this point.

I grew the first 3 sets of nodes, then cut the main stem.
The 6 nodes grew.
I clipped each of those, after they grew about 3 sets each.

They didn't all grow equally like I had expected. And every time I cut the new growths are much thinner than the last. Buds won't grow as big.. Right?

I have a choice.. I either cut the tall ones shorter, or try bending them so the canopy is more even.

My 2nd plant I only cut the main stem after it had 4 sets of nodes, and didn't touch it again. It has 8 thick tall stalks.

Click to expand...

Try this: https://www.growweedeasy.com/cannabis-plant-training
Nebula has some great info on a bunch of subjects.

Update:

So I transplanted to 5 gallon smart pots. I also bought 7 and 10 gallon smart pots for down the way.

It's only been a couple days so I don't know if it helped, but the yellowing got real bad now.

I increased the nutes for the other plant to see if it made a difference and burned the shit out of the leaves. Poor baby.... So deficiency isn't the problem.

I'm hoping the issue is the roots were bound but I'm wondering if these symptoms could be from too much calcium or magnesium.


The dirt I'm using is "Promix HP". Its a mix of sphagnum peat moss, perilite, limestone, and something for water retention I think..

Apparently limestone gives off calcium and magnesium?? (I've been adding 2ml calmag per 2 litres of water as instructions say)
Would that cause yellowing to browning leaves?

*bump*

pics?

Being a peat based media, and your watering PH, you probably sunk your medias PH down to 3. NOT GOOD.

Also get in there and prune that thing, remove plant material and it will need less nutrients to support itself. This will help with the deficiency.

Did you add any lime to it? most mixed won't have enough to last a long grow.

I'd top dress with dolomite and water with a higher PH for a bit to try and bring up that PH.

Also that nutrient looks like its a bit low on nitrogen for this size plant and stage of growth. You might want to add a bit more into you mix some how.

But it might just be the PH.

that plant looks quite rootbound meaning after transplant it may take a little bit to bounce back. in a week u may see good signs of vigor. I would have gone to a quite big pot waited until great signs of growth then flip and get what i can out of it. you have taken good care of it but the pot it was in was tiny for how big it got

looks to me like some of those branches are stretching to light. try bending her over and dropping the light down once she starts bouncing back

just stop feeding it so much she just needs root space good soil and some plain water n time u will be fine bro