• Here is a link to the full explanation: https://rollitup.org/t/welcome-back-did-you-try-turning-it-off-and-on-again.1104810/

Nutrient or Light Burn? Please help :)

R

rabbitA

Member
I am feeding her Maxigro - 1 small scoop per gallon, she is in DWC.
2 days ago i started using PH down to get it down to around 6.
Temperature at around 85F and Humidity is at 51

I know it says that i shouldnt post pics with the LED on but im no longer at the location and I can't snap another pic!

Thanks for any help or advice!girl001.jpg
 
Last edited:
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
Not light burn. Light burn affects the top only. You have a deficiency from bottom to top, you're off on NPK, or like you said, your PH was too high, but it looks hungry. If your new growth takes on this narcosis, then you're short on feed. But, hard to say without more info.. temps, RH, etc. There may be enough nutes there, but if the PH was out of whack, it won't take them up.
EDIT: Im no expert in DWC.
 
R

rabbitA

Member
DoubleAtotheRON said:
Not light burn. Light burn affects the top only. You have a deficiency from bottom to top, you're off on NPK, or like you said, your PH was too high, but it looks hungry. If your new growth takes on this narcosis, then you're short on feed. But, hard to say without more info.. temps, RH, etc. There may be enough nutes there, but if the PH was out of whack, it won't take them up.
EDIT: Im no expert in DWC.
Click to expand...
Temperature at around 85F and Humidity is at 51

Thanks a ton for your help / advice
 
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
First, your RH needs to be closer to 70% at this point at 85 degrees, at 51%, you're over transpiring with a kPa of 1.9 .... Kinda warm for a plant that young. 75 degrees, and 65%rh would prob be optimal. When they over transpire, they'll curl leafs, cup, and the edges will die off because they can't release water vapor fast enough at that rate. The dying off is thier defense to save water by cupping, and killing off thier own fan leafs to preserve water transpiration at a better rate, but not what you want.
 
Last edited:
S

Skillcraft

Well-Known Member
rabbitA said:
I am feeding her Maxigro - 1 small scoop per gallon, she is in DWC.
2 days ago i started using PH down to get it down to around 6.
Temperature at around 85F and Humidity is at 51

I know it says that i shouldnt post pics with the LED on but im no longer at the location and I can't snap another pic!

Thanks for any help or advice!View attachment 5093932
Click to expand...
What is your water temperature and your ec?
 
S

Skillcraft

Well-Known Member
I do not use maxigro. I run gh nutes. But I do run dwc and I keep my res temps around 65-68 degrees and a plant at that stage I would be feeding at around .9 to 1.1 ec. That is my preference others may differ. Hope you get her figured out. Wishing you a bountiful harvest. Happy Growing
 
R

rabbitA

Member
Skillcraft said:
I do not use maxigro. I run gh nutes. But I do run dwc and I keep my res temps around 65-68 degrees and a plant at that stage I would be feeding at around .9 to 1.1 ec. That is my preference others may differ. Hope you get her figured out. Wishing you a bountiful harvest. Happy Growing
Click to expand...
Well now that i have some guidance and not going at it blind - i think I should be able to get it sorted! Thanks again for all your help!
 
Star Dog

Star Dog

Well-Known Member
Double check I'm far from experienced with deficiencies, the necrotic leafs in the top picture looks like a calcium def I think.
 
J

jjcultivation

Member
I definitely do not have the horrific rust mites I can promise that I did months ago have root aphids but I've been checking the rockwool cubes with microscopes periodically and been doing root drenching and I haven't seen those in 4 weeks maybe even 6 weeks and then I did have a long time ago but I eradicated those two so I am 99.9% positive I do not have any pest whatsoever
 
W

waterproof808

Well-Known Member
jjcultivation said:
I definitely do not have the horrific rust mites I can promise that I did months ago have root aphids but I've been checking the rockwool cubes with microscopes periodically and been doing root drenching and I haven't seen those in 4 weeks maybe even 6 weeks and then I did have a long time ago but I eradicated those two so I am 99.9% positive I do not have any pest whatsoever
Click to expand...
are you the same person that made the original post? Because that is who i was referring to.
 
R

rabbitA

Member
Hey guys, OP here

I ordered vivosun PH and TDS meters

The EC looks like it measures in thousandths? It originally registered at 3140 on the EC - removed & replaced the water and now i have it at 1300, the PH at around 6.2

That required me to go half strength on the GH Maxigro nutes

Can i assume with the HIGH EC that it was nutrient burn? Could i be locked out? I did rinse down the roots before i put the new water in
 
smokey0418

smokey0418

Well-Known Member
rabbitA said:
Hey guys, OP here

I ordered vivosun PH and TDS meters

The EC looks like it measures in thousandths? It originally registered at 3140 on the EC - removed & replaced the water and now i have it at 1300, the PH at around 6.2

That required me to go half strength on the GH Maxigro nutes

Can i assume with the HIGH EC that it was nutrient burn? Could i be locked out? I did rinse down the roots before i put the new water in
Click to expand...
Monitor tomorrow with your meter.

During veg water may not fall quickly unless off coarse you have some bushes.

The Ph and Ec will change, this is were I would read with ppm as it’s finer.

Then micro adjust for what’s going on.

During veg, 5.9 would be the number I want.
 
R

rabbitA

Member
waterproof808 said:
the texture of the new growth looks similar to russet mite damage.
Click to expand...
i guess i really need to have a more keen eye, it does look strange - i am actually helping someone with this project and they are far away and i can only visit once in a while. I will have to try to get down there and look with a microscope i guess.... does Bonide Neem Oil work to get rid of these things?
 
You must log in or register to reply here.
Top