Light burn or Nute Deficiency?

  • Thread starter Otto Bonn
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Otto Bonn

Otto Bonn

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I did have my lights too close early on in the grow but I would expect more yellowing at the top of the plant. I only use Fox Farm nutes at 1/2 strength so my next thought was just give them a bump.
Now I'm second guessing that idea when I measured the ph of my runoff... I water at 6.5 but runoff is 5.8 so I'm now thinking it's a root PH thing? any advice/thoughts?
I'm running these Autos under 3 Viperspector 300s, soil/coco mix, they're right around 6 weeks in.
 
Light burn or nute deficiency
Light burn or nute deficiency 2
Light burn or nute deficiency 3
Beachwalker

Beachwalker

7,055
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Otto Bonn said:
I did have my lights too close early on in the grow but I would expect more yellowing at the top of the plant. I only use Fox Farm nutes at 1/2 strength so my next thought was just give them a bump.
Now I'm second guessing that idea when I measured the ph of my runoff... I water at 6.5 but runoff is 5.8 so I'm now thinking it's a root PH thing? any advice/thoughts?
I'm running these Autos under 3 Viperspector 300s, soil/coco mix, they're right around 6 weeks in.
Click to expand...
Use Dolomite lime to raise and stabilize soil pH
 
Otto Bonn

Otto Bonn

513
143
Beachwalker said:
Use Dolomite lime to raise and stabilize soil pH
Click to expand...
Is that faster acting than using liquid PH up? or is that what I should incorporate to my soil on the next grow?
I'm running my lights 24/7 so maybe just using a half dose of Tiger Bloom isn't enough.
I bumped my ph water to 6.9 and dosed them with 2/3 strength Tiger last night but I can't tell if I'm fighting two battles...I hate guessing.
 
growsince79

growsince79

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Otto Bonn said:
Is that faster acting than using liquid PH up? or is that what I should incorporate to my soil on the next grow?
I'm running my lights 24/7 so maybe just using a half dose of Tiger Bloom isn't enough.
I bumped my ph water to 6.9 and dosed them with 2/3 strength Tiger last night but I can't tell if I'm fighting two battles...I hate guessing.
Click to expand...
How much is 1/2 strength. The bottles and charts all contradict each other. And why are you using bloom nutes with 24 hrs light?
 
Otto Bonn

Otto Bonn

513
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growsince79 said:
How much is 1/2 strength. The bottles and charts all contradict each other. And why are you using bloom nutes with 24 hrs light?
Click to expand...
normal feeding is 3 tsp/gal. I was feeding at 1tsp/gal but went to 2tsp last night.
They're autos, so I just run 24/7
 
Otto Bonn

Otto Bonn

513
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I'm more confused with the run off PH... 5.5 to 5.8 seems awfully low. Bumping my feed water to 6.9 only brought the runoff to 5.9.
I reused some soil from another grow but mixed it with fresh, I'm thinking I may have a build up of salts?
 
growsince79

growsince79

9,065
313
Otto Bonn said:
I'm more confused with the run off PH... 5.5 to 5.8 seems awfully low. Bumping my feed water to 6.9 only brought the runoff to 5.9.
I reused some soil from another grow but mixed it with fresh, I'm thinking I may have a build up of salts?
Click to expand...
How often do you feed and water? Are you getting 10% runoff every time?
 
Otto Bonn

Otto Bonn

513
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every 3rd day I give them about 1 1/2 qts in my 2.5 gallon pot
 
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