Yellowing new growth on late seedling

[NoFrillsNoBills]

I'm not sure if it's still a seedling or has exited that stage and become a young plant at this point. This one has the 3rd node coming out now I believe, and it seems to be getting progressing to a more yellow/green coloring throghout the new growth, where in its early days it was much greener. The picture included below is darker in nature than the clean white lighting I'm sometimes able to capture it in which shows a more true to life version of the plant.

Im growing in coco and had forgotten that my water is a higher pH (7.8-8) and needs to be lowered. As best I can figure t out, there's 3 potential areas to address if there is indeed an issue forming.

1- Lighting is at 25" at roughly 60% power (2 320xl HLG) - could be getting too much light or not enough? should lower/raise? increase/decrease power? - had it turned down completely the first week based on other past post suggestions(forum is great, lot of preserved knowledge over time.

2 - over watering - as I understood, coco is hard to over water, and I don't think this is my issue, but it is possible. They're in 5 gallon pots and water twice a day currently as the coco begins to dry relatively quickly with the fans circulating

3 - because did not buffer the pH or the week prior, the coco is retaining a higher pH, preventing the roots that are potential looking to feed the inability to process Iron.

4 - I'm being overly concerned and there is no noticeable concern.

(if i can get a better lighting pic, I will update - managed to get a better one, it's the top pic)

 

[Arthur]

Feed schedule?

 

[St. Tom]

I'm not sure if it's still a seedling or has exited that stage and become a young plant at this point. This one has the 3rd node coming out now I believe, and it seems to be getting progressing to a more yellow/green coloring throghout the new growth, where in its early days it was much greener. The picture included below is darker in nature than the clean white lighting I'm sometimes able to capture it in which shows a more true to life version of the plant.

Im growing in coco and had forgotten that my water is a higher pH (7.8-8) and needs to be lowered. As best I can figure t out, there's 3 potential areas to address if there is indeed an issue forming.

1- Lighting is at 25" at roughly 60% power (2 320xl HLG) - could be getting too much light or not enough? should lower/raise? increase/decrease power? - had it turned down completely the first week based on other past post suggestions(forum is great, lot of preserved knowledge over time.

2 - over watering - as I understood, coco is hard to over water, and I don't think this is my issue, but it is possible. They're in 5 gallon pots and water twice a day currently as the coco begins to dry relatively quickly with the fans circulating

3 - because did not buffer the pH or the week prior, the coco is retaining a higher pH, preventing the roots that are potential looking to feed the inability to process Iron.

4 - I'm being overly concerned and there is no noticeable concern.

(if i can get a better lighting pic, I will update)

View attachment 1213774

your half solving your own problem ph and ec are one of the most important things in growing if you keep your ph in range and don't overfeed them your normally not going to get any issues and always feed to run off to avoid build-up also what nutes are you using

 

[NoFrillsNoBills]

Feed schedule?

I am using Canna A/B - currently just canna A. Light feeding (5ml/1gallon). Using the cocoforcannabs recommendation, am including calmag at 1ml/gallon. PPM was roughly 430 this morning with a ph of 8.1. Added pH down (bit more than intended), TDS dropped to 380 and pH went to 5.7.

Had been feeding them at the first sight of their true leaves. Found out that was the wrong thing to do. Was informed that the high pH was likely locking nutrients out to begin with preventing potential nutrient burn due to feeding too early so maybe was for the best. Held off feeds for last 3 days. This morning first time feeding since the last 3 days.

Brings us to today and current.

always feed to run off to avoid build-up also what nutes are you using

included above as asked. have been feeding to roughly 15% runoff

 

[Arthur]

After reading your last post @NoFrillsNoBills your on it... pH and ppm are your guide. When I run in coco, nothing ever goes in that hasn't been pH'd. Get the pH back in swing and you'll be set. Only possible issue I can see is 5 gallon bags is a LOT of coco per plant. I usually run 3 gallon or smaller with coco. You can feed twice a day, but at this point shouldn't be neccessary, unless your getting excessive drying, coco doesn't like to dry out, gets hydrophobic.

 

[NoFrillsNoBills]

@Arthur @St. Tom


Good morning, woke up and checked on them this morning and noticed them beginningg to do a spiral/twist and some oof the eaves beginning to claw? maybe.

Would appreciate input. I assuume it is something to do with how I watered yesterday.

 

[St. Tom]

she looks fine i often get funky looking leaves as long as your ph is bang on and you not overfeeding also with coco i feed with food from the very beginning just tiny amounts and if your using a make sure your using the same amount of b . plus your leaves have you got a fan blowing on your plants that could cause funky leaves of maybe higher your light slightly

 

[NoFrillsNoBills]

I was just about to bring up wind burn! I was wondering if that might be a cause as well. The fan has been on 3 (high) and may have been hitting harder than needed.


I misunderstood about feeding B. I thought it was started in Flower. I had the lights at 30" and dropped them to 25" recently as I thought they wanted more light. Lot of newbie lessons to learn . thanks

 

[Arthur]

First couple sets of leaves, unless you see a bug issue, like burning on the tips etc, don't sweat it too much. Sometimes you'll see an oddity or two that they grow out of quickly.

No need to move the lights yet, seedlings don't need much. I run the first 2 to 3weeks on 200w hanging at about 4 feet over a 4x4 area.

 

[St. Tom]

now canna a and b go together also here's the canna feed quite to give you more of an idea https://www.canna-uk.com/growguide