Light burn or deficiency?

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Clk55r1d3h

Member
Not sure what is got going on week 6, but started before, I thought it was light stress but it's getting around 800-1000 max. Even the lower ones have this light colored leaves not all but some do. The buds look fine, pistils nice and white just the leaves. And some of the leaves the underside is kinda purple, but that could be light stress or deficiency.

Using:
Coco ph: 5.7-6.0
Ec: 1.5 house and garden
Daily feeding they are not dry
Humidity: 50
Temp 77-80 during the day 70 night
Runoff ph: 5.8
Ec: 2.0-2.5

Pictures look too bright but they're not that vivid.
 

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Clk55r1d3h

Member
Went and looked at it again, so yeah moat are on the top colas bottoms look fine actually. Some here and there but I got 99 plants so thay may happen. I'm still thinking it's light stress.
 
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Clk55r1d3h

Member
Shit. Ok I'm starting overdrive tomorrow. That should bring it back to normal?

Also, isn't potassium mobile, wouldn't my lower leaves get affected first.
 
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furnz

furnz

Well-Known Member
Coco ph? Or nutrient solution ph?
I'd guess your N is too high and ph is too low.
House and garden hides npk and their website is broke, so I have no idea what your working with.
 
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Clk55r1d3h

Member
Should I be feeding calmag at this stage? I've done it before just not this grow. My tap water is .4ec. According to house and garden rep you don't need calmag unless you're going over 9 weeks.
 
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Clk55r1d3h

Member
Ok would you recommend base nutes plus overdrive plus 3ml/gal calmag supplementation? Also noticed some of the branches towards the top are purple. Then again I heard led can have that affect.
 
Jjgrow420

Jjgrow420

Well-Known Member
You're only feeding once per day? How big are the pots vs size of plants. If I don't feed at least 2-3 times a day I get issues especially with high light levels. Could be an issue with your ec rising up as the coco is drying and building up salts causing a lockout. You could add as much p-k as you can possibly add...it's only going to make things worse.
Twisted, curling leaves and burnt tips dont sound/look like a deficiency to me.
 
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Clk55r1d3h

Member
They are 5 gallon pots, I water once a day with a lot of runoff. Runoff ec is 2.0-2.5 ph is 5.7-6.0. Feeding 2.0ec. Nute burn would affect throughout though. I'm not getting that. I dunno what to think honestly. I've been blaming on light burn but I don't know anymore.

And you can see some don't even have tip burn, just inside of the leaf getting lighter.
 
Jjgrow420

Jjgrow420

Well-Known Member
That is not light burn.
Leaves will taco with too high ec because the leaves are getting damaged and can't handle the light even if it's not 'too high' Drop your ec and feed more often/ dim your lights for a few days and your problem will go away. Or don't and continue chasing your tail. Up to you.
Most people won't go above ec 1.4-1.5 and feed multiple times per day 2.0-2.5 would maybe be fine if you had monster plants that were well established.
Not every plant will react the same. Continue feeding high ec and they will all burn and become kfc
Good luck
 
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Clk55r1d3h

Member
Tomorrow I will flush them out and feed right after. What would you recommend dosage be for overdrive. Base nutes amount to 1.0 ec and again should I be supplementing with calmag? I haven't this while grow.

Are we sure this is not an actual deficiency.
 
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