Yellowing leaves.

tip top toker

tip top toker

Well-Known Member
Seems every time i look through pictures of what certain deficiencies are supposed to look like, i end up with a handful that my plant could fall into.



Sweettooth in a dwc bucket, nutes and ph are both acceptable strengths and levels, about 3 weeks into 12/12. Her clone is in pretty much the same conditions just in veg and looks great.

Thinking it's either a deficiency (i kinda snapped all the stalks and bothed them bakc together meaning that it's having a hard time getting the nutes up high) or maybe light bleaching? (never experienced this but it is a brand new 600w in there instead of the normal 400w)
 
Mazar i Shariff

Mazar i Shariff

Active Member
Three things ...

1) Yellowing - This is majority Nitrogen defeciency, you're going to want to boost these levels

2) Edge of Leaves Curling - You have a slight Calcium-Magnesium defeciency. You're going to want to boost these micronutrient levels. This defeciency could also be assisting in the yellowing of your leaves.

3) Purple Stems - Phosphorus defeciency, boost levels slightly

Overall, it sounds like you need a good veg/grow nutrient boost. An NPK ratio that is roughly 15-5-10 or 15-10-10 is going to be ideal, and then either using a NPK formula that contains CalMag in it, or adding a CalMag booster along with the NPK formula will help cure the micro defeciency problems as well.

Hope this helps! Good luck!
 
bird mcbride

bird mcbride

Well-Known Member
Yellowing can also be caused by lighting. If it were me i'd put both lights on it if that's possible. Be careful with the nutrients because when the plants become more active they'll have more intake. They are a weed and weeds burn easy. Be sure the tempature doesn't go over 80 degrees F. in the op. Use intake fan(s) in compliment with exhaust fan(s) if applicable. Make sure you have good air circulation in the op. I wouldn't worry so much about those leaves so long as the bud leaves are good and green.
 
Mazar i Shariff

Mazar i Shariff

Active Member
bird mcbride said:
Yellowing can also be caused by lighting.
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Yes, but that's quite apparent to be nutrient defecient. I'm an outdoor grower and regardless of how many bright sunny days I've had under the sun, it's never made my leaves look like that. Light burns usually end up more as spots or blotches on the leaf that have a bleached kind of look. If those were my plants and I was gonna go into my nutrient closet to fix that, I would be using the following:

Organic Fish Emulsion @ 5-1-1 - This would be a great nitrogen booster, and offers both readily available and slow release nitrogen

Organic Tea @ 6-3-5 - Good overall NPK to boost all levels

Cal Mag Plus - Micro supplement that would stop your leaves from "praying for magenesium"
 
tip top toker

tip top toker

Well-Known Member
Hmm, from what i'm looking at and reading around it seems more like zinc or iron or something. The Yellowing is occuring from the top of the plant, not the bottom or middle, and is starting at the base or leaves and slowly taking over. Off to work then a touch more reading.
 
max316420

max316420

Well-Known Member
tip top toker said:
Hmm, from what i'm looking at and reading around it seems more like zinc or iron or something. The Yellowing is occuring from the top of the plant, not the bottom or middle, and is starting at the base or leaves and slowly taking over. Off to work then a touch more reading.
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I agree, it looks like a zinc def....What kind of water are you using? Also '' marijunana is NOT a WEED''
 
303

303

Well-Known Member
tip top toker said:
Hmm, from what i'm looking at and reading around it seems more like zinc or iron or something. The Yellowing is occuring from the top of the plant, not the bottom or middle, and is starting at the base or leaves and slowly taking over. Off to work then a touch more reading.
Click to expand...
Also agree, looks zinc def to me
 
303

303

Well-Known Member
Also agree, looks zinc def to me
bird mcbride said:
Yellowing can also be caused by lighting. If it were me i'd put both lights on it if that's possible. Be careful with the nutrients because when the plants become more active they'll have more intake. They are a weed and weeds burn easy. Be sure the tempature doesn't go over 80 degrees F. in the op. Use intake fan(s) in compliment with exhaust fan(s) if applicable. Make sure you have good air circulation in the op. I wouldn't worry so much about those leaves so long as the bud leaves are good and green.
Click to expand...
I am now dumber because I read this.
 
tip top toker

tip top toker

Well-Known Member
Just using ph'ed tap water, been using it no trouble for a long while now, it's clone is using the same water, just vegging not flowering, and is healthy healthy. This is prgressively getting worse. Will have a look around for a simple zinc supplement, and if all else fails, well fuck it, i'll just bin her.
 
max316420

max316420

Well-Known Member
I would foliar feed with a good veg food, but make sure to back your lights off so you don't burn them. Water can act as a magnifier and burn your leaves. If your ppm in your water is to high you could be getting a lockout.
 
303

303

Well-Known Member
max316420 said:
I would foliar feed with a good veg food, but make sure to back your lights off so you don't burn them. Water can act as a magnifier and burn your leaves. If your ppm in your water is to high you could be getting a lockout.
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Yeah if shes in veg I'd go a little heavy on a veg nute, superthrive or revive or whatever revivial product you have. I don't believe in foliage feeding.
 
max316420

max316420

Well-Known Member
i don't usually either but i found if works great when you have a def.. and DON'T foliar feed with superthrive, use it as a rootsoak
 
tip top toker

tip top toker

Well-Known Member
Well she's currently sitting in a bucket of a half half mixture of veg and flowering nutes in a hope that there's something there that she'll like. I'm not the type to go out and buy lots of little bottles of this and that to give to my plants so i'll just leave her do as she will try to do and if all fails, well hell, i have a clone, it's no loss :)

So confusing though, seems no two websites/guides treat the same symptons as the same def, or even agree on symptons. One guide sais zinc effects new to old growth, another states it effects old to new, both from reputable sources. One page is telling me it must be zinc, another is telling me is must be iron. Think i'll just try add some K
 
tip top toker

tip top toker

Well-Known Member
The solution was a hefty dose of canna PK 13/14, her clone is now flowering and showing exactly the same symptoms, now i know what to do :)
 
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