Light burn or nitrogen deficient/ph issues?

H

Hutsation

Member
Recently my green crack plant has been showing some signs of yellowing my first thought was ph, then nitrogen but I can’t help but feel like the fact that my setup is so small that the buds just grew too close to the light. I measured the lux at just under 50,000 at bud height, which from what I understand is perfectly fine. Just want some other opinions before I take action .
Grow space is 2x2x4
Lighting is HLG 65 v2 4000k
I might be an idiot but be nice haha
 

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JustBlazin

JustBlazin

Well-Known Member
looks like mag def to me, but I'm no expert
reason i say that is the veins are staying green, what are you feeding them?
might need some cal/mag
 
JustBlazin

JustBlazin

Well-Known Member
and what's your ph, your right that could be the problem, don't think it's light burn as that wouldn't affect the bottom leaves
 
H

Hutsation

Member
Been Supplementing with cal mag every watering but I suppose I should pour water through it and test the ph. Will report back
 
JustBlazin

JustBlazin

Well-Known Member
measuring runoff doesn't always give you accurate assessment of your soil ph.
think if your in living soil you don't want to do this
 
H

Hutsation

Member
Yeah, I was avoiding it. I’ve spent some time building up those microbes. But I also just discovered how uncalibrated my ph meter is. So I think I might have an answer
 
JustBlazin

JustBlazin

Well-Known Member
Hutsation said:
I’m growing with soil (promix) and I usually water with 6.4 - 6.8
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ok and what type of nutrients? Salt based? Organic liquid?
i use promix that i add dry amendments' and i ph to around 6.5 not even sure if i have to cause of all the buffers i put in my soil.
but when i used promix with salt Nutes I think my ph was closer to 6.0
 
JustBlazin

JustBlazin

Well-Known Member
how much cal/mag you giving it?
and what's it say on the bottle?
my guess would be to add more cal/mag
 
JustBlazin

JustBlazin

Well-Known Member
Hutsation said:
Definitely interested in dry amendments though
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I've used promix with salt nutes called DNF worked good
then switched to pure blend to try organic which was ok just yield wasn't quite as good
got sick of mixing up water and also found pure blend left after taste in most of the bud it grew.
so went away from promix for the first time and bought a bag of living soil and absolutely loved straight water growing plus it tastes better. Now I'm back to promix but i add dry amendments and ewc to make my own kind of living soil and have been using this method with great success for over a year now, plus i got blumats 4 months ago and they go together with living soil like peanut butter and jelly.
my rooms never and i mean never looked so good
 
Tracker

Tracker

Well-Known Member
What nutrients are you using? What kind of water are you using? Looks like maybe sulfur or iron. Do your nutes have those? Sulfur will come from a sulfate component. Could be nitrogen if you have only been using low N bloom nutes since the very beginning of 12/12. Since the lower leaves are looking worse, that may indicated that it's a mobile nutrient, but It looks like it's got yellowing all over.
KRuFnY4-768x770.jpg
 
H

Hutsation

Member
Tracker said:
What nutrients are you using? What kind of water are you using? Looks like maybe sulfur or iron. Do your nutes have those? Sulfur will come from a sulfate component. Could be nitrogen if you have only been using low N bloom nutes since the very beginning of 12/12. Since the lower leaves are looking worse, that may indicated that it's a mobile nutrient, but It looks like it's got yellowing all over.
View attachment 4759018
Click to expand...
The nutrients I use have iron and sulfur in them. Can’t see anything on the bottle as far as actual values but I also add liquid kelp into the mix. Honestly with the way my ph meter was, I must have actually been watering at 7.5- 8.5, I actually don’t know. I realized it was off after I finished using the last of the water I made using it. It would make sense for all sorts of things to go wrong if that was the case.
 
H

Hutsation

Member
JustBlazin said:
I've used promix with salt nutes called DNF worked good
then switched to pure blend to try organic which was ok just yield wasn't quite as good
got sick of mixing up water and also found pure blend left after taste in most of the bud it grew.
so went away from promix for the first time and bought a bag of living soil and absolutely loved straight water growing plus it tastes better. Now I'm back to promix but i add dry amendments and ewc to make my own kind of living soil and have been using this method with great success for over a year now, plus i got blumats 4 months ago and they go together with living soil like peanut butter and jelly.
my rooms never and i mean never looked so good
Click to expand...
Yeah I’ve seen a lot of the buds that come off of plants using a similar setup to you and they just seem like the way to go. Just water and collect some delicious bud.
 
Tracker

Tracker

Well-Known Member
This picture was clipped from Greenhouse Operation and Management 7e by Paul V. Nelson. It's a good reference textbook.


pH and nutrient availability.PNG
 
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