Too much yellow for 5th week?

Ydoineedtoregister

Ydoineedtoregister

Member
Hi. 3rd attempt at growing... failed space bucket bc crap soil and 2 autos that I thought hermed so I tossed. Yes that hurt very much when I realized it....... they were tiny anyway
Anyway.....

I have a bagseed that is in its 5th week of flower.
There is allot of yellowing on the leaves and I'm a bit worried since there's at least 3-4 weeks left..

Using ffof. 3gal fab pot. Fox farm trio and cal mag. Vivosun Aeroaw2000se Last fed last night a little less than 1 gallon. About 1/3rd of recommended dose... ph was 6.4 gong on and 6.5 coming out. 500 ppm going in and 1100 coming outI think they got a tad burnt last feed so I didn't want to increase the amount... Fox farm says 2000 for ppm!! That can't be right?? I thought 1200 or so.

She doesn't look too bad from above but from side you can see a lot of yellow. And I cut like 3 or 4 leaves that were dying or did. I was told some yellowing of bottom leaves was normal at beginning of flower but just want to be safe.

Hard to tell from pics but she did look pretty yellow underneath...20240929_202551.jpg20240929_202543.jpg20240929_202532.jpg20240929_202551.jpg20240929_202543.jpg20240929_202532.jpg20240929_195526.jpg20240929_195458.jpg20240929_195455.jpg

Tyvm.
 
THT

THT

Well-Known Member
overall still looks fine, very well developed for only 5 weeks, fox farms is hard to regulate, soil PPM after runoff is hard to account for some factors, PPM doesnt tell you how much nutrient is in the water, it tells you more or less how electrically conductive that water is with metals. Test and trust the water you put in and if you've never tried other mediums or methods I suggest giving them a go, DWC is my favorite and does away with some of these harder to control variables.
 
Billy the Mountain

Billy the Mountain

Well-Known Member
Ydoineedtoregister said:
Hi. 3rd attempt at growing... failed space bucket bc crap soil and 2 autos that I thought hermed so I tossed. Yes that hurt very much when I realized it....... they were tiny anyway
Anyway.....

I have a bagseed that is in its 5th week of flower.
There is allot of yellowing on the leaves and I'm a bit worried since there's at least 3-4 weeks left..

Using ffof. 3gal fab pot. Fox farm trio and cal mag. Vivosun Aeroaw2000se Last fed last night a little less than 1 gallon. About 1/3rd of recommended dose... ph was 6.4 gong on and 6.5 coming out. 500 ppm going in and 1100 coming outI think they got a tad burnt last feed so I didn't want to increase the amount... Fox farm says 2000 for ppm!! That can't be right?? I thought 1200 or so.

She doesn't look too bad from above but from side you can see a lot of yellow. And I cut like 3 or 4 leaves that were dying or did. I was told some yellowing of bottom leaves was normal at beginning of flower but just want to be safe.

Hard to tell from pics but she did look pretty yellow underneath...

Tyvm.
Click to expand...
Where did you see a recommendation to feed with an EC of 4.0 (2000ppm)?
As suggested, your plant is showing the stereotypical N deficiency symptom: yellowing starting on older, lower leaves since N is being reallocated to newer growth.
Bump up your EC a little.
Yellowing is by no means normal during early flowering although, if moderate, it's not a big deal and easily rectified.
 
Ydoineedtoregister

Ydoineedtoregister

Member
Billy the Mountain said:
Where did you see a recommendation to feed with an EC of 4.0 (2000ppm)?
As suggested, your plant is showing the stereotypical N deficiency symptom: yellowing starting on older, lower leaves since N is being reallocated to newer growth.
Bump up your EC a little.
Yellowing is by no means normal during early flowering although, if moderate, it's not a big deal and easily rectified.
Click to expand...
Can I just add some nitrogen only from some ammendment (think that's what it's called)?
 
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Billy the Mountain

Billy the Mountain

Well-Known Member
Ydoineedtoregister said:
Can I just add some nitrogen only from some ammendment (think that's what it's called)?
Click to expand...
Wow, all the more reason to ignore a nute manufacturer's recommendations.
I have no experience with Fox Farm products, but in general, if you're feeding at 1/3 strength and seeing a deficiency, try 1/2 strength.
I grow w/ coco and have never used more than 1.5 EC with any cannabis plant.
 
dwc420letsgo

dwc420letsgo

Well-Known Member
Billy the Mountain said:
Wow, all the more reason to ignore a nute manufacturer's recommendations.
I have no experience with Fox Farm products, but in general, if you're feeding at 1/3 strength and seeing a deficiency, try 1/2 strength.
I grow w/ coco and have never used more than 1.5 EC with any cannabis plant.
Click to expand...
it depends on lighting intensity, and other environmental factors, but yes that is a good rule of thumb for EC. Anyways, if unsure, a little underfed is better than overfed.
 
Ydoineedtoregister

Ydoineedtoregister

Member
dwc420letsgo said:
it depends on lighting intensity, and other environmental factors, but yes that is a good rule of thumb for EC. Anyways, if unsure, a little underfed is better than overfed.
Click to expand...
Yes i was thinking id rather underfeed than over..

when you've had nutrient toxicity as as first grower it makes you worry so you give less and then this happens....

Something I'm wondering is with the ff trio nutes you can't isolate a deficiency bc you would be adding other nutes also that may not be needed and would cause toxicity......

So what to do when there is clearly one specific nutrient deficiency... not saying about this plant but general question for future reference.... do you top dress with nitrogen rich .... something.
 
dwc420letsgo

dwc420letsgo

Well-Known Member
same thing, different units of measurement. 0.1 EC = 50 ppm, 1 EC = 500 ppm, 2 EC = 1000ppm. This is on a 500 ppm scale.
 
Billy the Mountain

Billy the Mountain

Well-Known Member
Ydoineedtoregister said:
Any advantage to using ec as opposed to ppm? Isnt ec better for hydro? Think i read that
Click to expand...
Yes
Yes
There's no ambiguity with EC, it's a measure of conductivity; i.e. how "salty" the solution is.
PPM is a derived measure and is simply EC multiplied by a constant, usually 0.5, (.7 and .64 scale meters also exist).
PPM is misleading because, despite the name, it doesn't measure or reflect the total elemental ppm in solution (unless you're measuring NaCl).
 
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