Sudden yellowing of lower leaves w brown spots. OMG What is wrong now grrrr :(

N

noob o rama

Member
This yellowing happened suddenly, in two days the leaves turned horribly yellow, see picts and stats below. Any advice would def be earning some rep points.
stats
24 hours light regiment with 6 cfl's
TEmp - 78 to 80 constantly
humidity = moderate at 40 to 60 percent

Nutes, liquid stuff 8-4-4- that I add in every other watering.
Plant was very dry when I took these pictures, but I don't think that underwatering is causing this. The plant is not droopy, see picts.

Plant is in miracle grow soil since Nov 1st.
Yellow leaves on bottom1.jpgEntire plant view.jpgYellow leaves on bottom 2.jpg​
 
MVNuggets

MVNuggets

Member
I would guess that its because that plant is under 24 hour light. Older plants need a dark cycle unlike seedlings. The dark cycle is when most roots do their storage transfers, IE moving nutes to plants etc.

Try putting her under 18/6 or 20/4, not to stress it out before you flower... you probably are planning on flowering soon right? Plants double or triple in size when they flower... I dont know how big that grow room is.

Hope that helps

MVNugs
 
N

noob o rama

Member
MVNuggets said:
I would guess that its because that plant is under 24 hour light. Older plants need a dark cycle unlike seedlings. The dark cycle is when most roots do their storage transfers, IE moving nutes to plants etc.

Try putting her under 18/6 or 20/4, not to stress it out before you flower... you probably are planning on flowering soon right? Plants double or triple in size when they flower... I dont know how big that grow room is.

It's in indoor grow, so she can get taller. I don't know a thing about flowering or prepping her fro flowering yet, any suggests or a guide to read up on it. Thanks for letting me know that they can double in size once they flower. How much you think she will yield? For reference, she is about 1.5 feet and has 7 main "stems" coming from her "trunk" I can post more pictures if you'de like
Click to expand...
 
Serapis

Serapis

Well-Known Member
Your plant looks healthy in the second photo, other than the top growth, butt hat could because it was dry as you say. (leaf cupping).

I'd suggest you flush the plant, transplant (almost 3 months in same pot), gently increase nutes and flip lights to flower soon.
 
darkdestruction420

darkdestruction420

Well-Known Member
MVNuggets said:
I would guess that its because that plant is under 24 hour light. Older plants need a dark cycle unlike seedlings. The dark cycle is when most roots do their storage transfers, IE moving nutes to plants etc.

Try putting her under 18/6 or 20/4, not to stress it out before you flower... you probably are planning on flowering soon right? Plants double or triple in size when they flower... I dont know how big that grow room is.

Hope that helps

MVNugs
Click to expand...
they dont need dark, cannabis is c4, not c3(it might be the other way around, but the point they are in the class that continually absorbs c02 and does all needed things regardless of its getting dark or not.

Whats your ph at? salt from nutrients can build up over time too, so a good flush would probally not hurt.
 
Serapis

Serapis

Well-Known Member
darkdestruction420 said:
they dont need dark, cannabis is c4, not c3(it might be the other way around, but the point they are in the class that continually absorbs c02 and does all needed things regardless of its getting dark or not.

Whats your ph at? salt from nutrients can build up over time too, so a good flush would probally not hurt.
Click to expand...
I agree with you and Ed about 24 hour light, however I have tried both, and I honestly can see better results with 6 hours of dark. AND it saves me 3.6 kw/hrs per day. I do go 24 hours with Flouros, but not HID.
 
*BUDS

*BUDS

Well-Known Member
bro your cfls arnt cutting it. the canopy of the plant is now not allowing any light down there resulting in the plant yellowing and dropping those leaves.
 
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