Young Yellow Leaves

[billgee]

Got a problem.
Light colored, almost yellow, young leaves.
Been around a couple of weeks on these vegging clones.
Been hard to photograph so I aint posted.
Think I got it this time.
Gotten to the 2nd level in the 1st (best) picture.
Its all the leaves when theyre very young and between the darker veins as they get to the 2nd and 3rd levels.

Theyre fed a Canna regimen and usually all I see is a sea of green (non-sog). They are living under 400/600 mh lights.
Seems like theyre short Nitrogen but Im not sure.
The deficiencies listed everywhere dont quite list young yellow leaves (and the 2nd and 3rd levels are still young just older than the first-hardly old).
And if it is a nitdef what do I do?

 

[moxil]

I would wait for some more experienced growers to answer your question but to me, its looks like a nute overdose maybe even locking out N. Going by the first picture are the leaves crunchy like? you may have the light too close as well. Wait ec are you feeding them i would flush them with a mild nute solution around 1ec let the pot dry and then continue normal feeding. But take what i say with a grain of salt as i said earlier a more experienced grower will be able to help you further

 

[billgee]

thanx mox
good advice.
You may be right (I think it sounds bout right) but Ill wait

 

[Snow Crash]

They don't look exceptionally happy and I worry that adding something to your system will upset another factor that's right on the edge.

Here's what I would do:
Add a product with Nitrogen, Calcium, Magnesium, Iron, and Sulfur. Typically Botanicare's Cal-Mag Plus is the choice for this role. Use 1/2tsp per gallon (about .75ml/L) and then add your base nutrients. The total EC right now should be in the 0.8 to 1.0 range after base+supplements, so reduce feed levels if need be and get some extra runoff for a while to rebalance the cation bank.

 

[vapor]

Got a problem.
Light colored, almost yellow, young leaves.
Been around a couple of weeks on these vegging clones.
Been hard to photograph so I aint posted.
Think I got it this time.
Gotten to the 2nd level in the 1st (best) picture.
Its all the leaves when theyre very young and between the darker veins as they get to the 2nd and 3rd levels.

Theyre fed a Canna regimen and usually all I see is a sea of green (non-sog). They are living under 400/600 mh lights.
Seems like theyre short Nitrogen but Im not sure.
The deficiencies listed everywhere dont quite list young yellow leaves (and the 2nd and 3rd levels are still young just older than the first-hardly old).
And if it is a nitdef what do I do?

iron def makes young leaves yellow.
what is your ph of run off?

 

[lr3]

are you using calmag? calcium and magnesium deficiencies are common. i learned the hard way with most of my last grow having calcium deficiency during flower leading to low yields and inferior quality bud. my mistake was that we were using filtered tap water, with high amounts of Calcium the last grow--then switched to RO water and didn't account for the lack of calcium in RO water compared to filtered tap. now with every watering i am adding at least 150-200 ppm calmag until i'm ready to flush the medium before harvest. Also, from what i have read, coco requires more CalMag than other growing mediums. i won't make that mistake a second time!

 

[Laughingcat]

I'm dealing with plants that look exactly like yours.

My problem is salt levels. PPM of 1250 and a PH of 7.3+ Horrible water even after being mixed with RO water.

I will be transplanting into good balanced Coco.

 

[Laughingcat]

Forgot to mention that the PH and PPM's were taken from a soil slurry test. 2 Tbsp soil, 2 Tbsp neutral distilled water.

 

[lr3]

I'm dealing with plants that look exactly like yours.

My problem is salt levels. PPM of 1250 and a PH of 7.3+ Horrible water even after being mixed with RO water.

I will be transplanting into good balanced Coco.

pH lockout could well be another reason. if you switch to coco, be sure to add calmag to your nutes as you'll need more in coco than in other media (from what i have read, and from my own deficiency experience with coco).

 

[Laughingcat]

Thanks for the input ir3. Much appreciated.

 

[billgee]

Theres more than one answer to this question.
and were all right and wrong.
I did a test on the overflow and then a slurry test.
The results sucked.
PPMs out of sight
I remembered ...
Im using Coco
(And all you coir users listen up)
A Canna rep had told me that Coir is better than soil because it can be re-used.
His advice "use it 4 times and throw in 20% new coir each time.
But my shocking runoff pH reminded me I had failed to wash it each time to remove the old nutes. So I flushed hard. Fed them well with an extra portion of Cal Mag
And it worked but was so surprising was the speed. Most turned back to Canna green the next day and more surprising the old yellow leaves turned green and the bad parts on the older leaves were cured mostly

 

[Laughingcat]

And it worked but was so surprising was the speed. Most turned back to Canna green the next day and more surprising the old yellow leaves turned green and the bad parts on the older leaves were cured mostly

I'm happy for you bilgee!

Still haven't had the guts to transplant mine into something neutral yet.... These plants, even though they're a bit ill still look fantastic... Just hate to harsh their mellow with additional stress.

Tomorrow for sure and hope I have the results you had.

 

[Phlip]

Plz plz help

Plz plz help

Hi there people, just wanna introduce my self....... I'm phil

I am new to this growing "indoor" and have a problem with a rooted cutting I took from a friend!

 

[stihgnobevoli]

and more surprising the old yellow leaves turned green and the bad parts on the older leaves were cured mostly

old yellow leaves turned green? lol i call bullshit.

Phlip did you get that clone looking like that or did it get that way after you had it.

if it was like that already then you need to feed it lightly till it resumes growing again, if you did that, you need to back off your nutes for a while till it resumes normal growth. basically you are feeding more food than this plant can handle at it's young age.