Leaves curl up in flower stage. Pls help(with photos)

ligrow

ligrow

Well-Known Member
Happy 2016 everyone!

Im in 56 days of flower, grow kosher kush in 4 by 4 tent, in DWC with 600W air cool hood 12" above the top cola. About a week ago, some fan leaves on the top started to turned yellow. yesterday it show some dark brown dot even black dot on leaves, and leaves curl up. as you can see in the photos. someone pls help to identify want it is. every appreciated and thanks in advance.
 

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ligrow

ligrow

Well-Known Member
az2000 said:
They look overfed to me. Photos in natural light will help you get better responses!
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thanks for the reply!
I remember you help me with other thread before. every appreciate bro.
My EC was stay 1.6 for last three weeks, as I am reach the end of the stage I drop it down to 0.9 last week
and....its what you see in the photo tho...
I will try to get one with natural light soon.
 
A

az2000

Well-Known Member
ligrow said:
I fed lucas formula. I add 8/16ml per gallon when flower as it recommend
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You're creating NPK ratio 1-1.9-1.7. That's pretty high in PK. (In soil, I end at 1-2-1.7.). If you've been doing that for awhile, it could explain why the plant's looking rough right now.

Maybe someone who uses the so-called Lucas Formula could indicate whether that's how it's supposed to look. I assume it's not since so many use GH Flora 3-part that way (as a "two part").
 
ligrow

ligrow

Well-Known Member
xxorezxx said:
Which is the temperature of indoor?, specially at the top of the plants. it looks like heat stress. Plus some fertilization problems.
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Thanks for the reply
room temp. is around 20 Celsius. i dont know how to measure temperature on the top of the plant, but no heat tho. some lower colas' leaves curl up too.
what do i do now? do i need to flush?
 
xxorezxx

xxorezxx

Well-Known Member
If temp is around 20° I think it is not heat stress, so I don't really know, Az200 seems to have more experience in the issue.
 
ligrow

ligrow

Well-Known Member
az2000 said:
You're creating NPK ratio 1-1.9-1.7. That's pretty high in PK. (In soil, I end at 1-2-1.7.). If you've been doing that for awhile, it could explain why the plant's looking rough right now.

Maybe someone who uses the so-called Lucas Formula could indicate whether that's how it's supposed to look. I assume it's not since so many use GH Flora 3-part that way (as a "two part").
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Yes, its been a while.....if it show yellow spot in the end of the leaf edge is the sign of nutrient burn right?
Honesty, i dont know about the ratio of NPK, I just follow the feeding schedule maybe a little less than recommend. How do I know the raito of NPK?
What do I have to do now? Thanks!
 
A

az2000

Well-Known Member
ligrow said:
How do I know the raito of NPK?
What do I have to do now? Thanks!
Click to expand...
There is a spreadsheet which will let you see the NPK ratio of mixing two (or more) bottles. The nice thing about being aware of your NPK ratio is that it helps you "read your plant" instead of a "schedule." You can remove yourself from boutique "lineups," getting any NPK ratio you want from any products available to you.

I know some people swear by the so-called "Lucas Formula." But, eliminating a bottle from a multi-bottle "lineup" seems like a random way to get to a desirable NPK ratio. (I.e., why not use a product designed to create that ratio, instead of getting there by using part of a product? It just seems weird to me.).

If you used GH 3-part as specified you would be feeding a reasonable 1-1.28-1.59 NPK ratio. I would use half-strength (2.5ml, 5ml, 7.5ml). Maybe 3/4 strength.

I don't know about "Lucas." Maybe someone who uses it can say whether that's how the plant should look. I don't think it is. Maybe it's a different problem. (I'm not trying to be facetious. I know some people like their plants to starve near the end.).
 
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ligrow

ligrow

Well-Known Member
az2000 said:
There is a spreadsheet which will let you see the NPK ratio of mixing two (or more) bottles. The nice thing about being aware of your NPK ratio is that it helps you "read your plant" instead of a "schedule." You can remove yourself from boutique "lineups," getting any NPK ratio you want from any products available to you.

I know some people swear by the so-called "Lucas Formula." But, eliminating a bottle from a multi-bottle "lineup" seems like a random way to get to a desirable NPK ratio. (I.e., why not use a product designed to create that ratio, instead of getting there by using part of a product? It just seems weird to me.).

If you used GH 3-part as specified you would be feeding a reasonable 1-1.28-1.59 NPK ratio. I would use half-strength (2.5ml, 5ml, 7.5ml). Maybe 3/4 strength.

I don't know about "Lucas." Maybe someone who uses it can say whether that's how the plant should look. I don't think it is. Maybe it's a different problem. (I'm not trying to be facetious. I know some people like their plants to starve near the end.).
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AZ2000 thanks for this helpful information
I already noted that! this spreadsheet should help me. I will take some time to figure it out.

I use GH 3 part at first couple runs, result seems fine, but not too big on buds. I read some thread and many recommend Lucas Fomula, and tell it save nutrients. where I live is not easy to get nutrients. Have to pay a lot to ship all the way here. so i heard some said they dont change res often when use lucas formula. so i just give a shot, but here is what i get....btw if you grow hydro how often do you change water?

I think you got my point here. I think they already in late stage of flower(56 days).
EC was 1.6 untill I add water cut it down to 0.9 last week. I thought this should help with nutrients burn but i didn't. I want to flush with EC 0.1 tap water for last two week. Im not sure how when do I flush or I flush now as the leaves curl upper and upper daily.
 
ligrow

ligrow

Well-Known Member
Terry385 said:
just wonder what do the roots look like
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Looks like root zone have some problem...
Those black spot are dead larvae. I have this larvae problem when three weeks after flip 12/12
then i add bleach in res they all dead. my plant is in scrog net i dont know how to clean it up. so many problem on my DWC....want to make an ebb n flow system for next run...

As photo tells, this should be root rot right? pls let me know whats your best solution when facing this shit. Thanks!

IMG_0196.JPG

IMG_0193.JPG
 
Terry385

Terry385

Well-Known Member
you in flower sorry to say but roots stop growing in flower or not much all the fine roots are gone not much can be done with roots plant is eating the leaves to bud let it go to day 63 65 see what looks like
 
ligrow

ligrow

Well-Known Member
Terry385 said:
you in flower sorry to say but roots stop growing in flower or not much all the fine roots are gone not much can be done with roots plant is eating the leaves to bud let it go to day 63 65 see what looks like
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Thanks for the reply!
Dont need to flush or any treatment at this moment? or I can only wait to see how it go?
Is this really harmful for the end result of the bud?
 
Terry385

Terry385

Well-Known Member
ligrow said:
Thanks for the reply!
Dont need to flush or any treatment at this moment? or I can only wait to see how it go?
Is this really harmful for the end result of the bud?
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don't need to flush if you want to you can.. looks like week 7 of 9 for say bud well be fluffy but smoke able
 
hotrodharley

hotrodharley

Well-Known Member
ligrow said:
Looks like root zone have some problem...
Those black spot are dead larvae. I have this larvae problem when three weeks after flip 12/12
then i add bleach in res they all dead. my plant is in scrog net i dont know how to clean it up. so many problem on my DWC....want to make an ebb n flow system for next run...

As photo tells, this should be root rot right? pls let me know whats your best solution when facing this shit. Thanks!

View attachment 3576741

View attachment 3576742
Click to expand...
Are they slimy? The color can be normal. They don't look slimy or clumped.
 
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