What is happening to this baby?

[wollywonka]

Hi! First post here...
This poor plant had a super start until it flowered...
Spider mites infestation and now this yellowing that goes on and never stops... Started more than 1 week ago.. I'm removing the yellows as they come, but at this point i'm asking to you why is this happening..
I'm growing in light mix, forbidden runtz auto, biobizz nutes slightly less than schedule. MH TS1000, 600ppfd.
Soil PH is good, water PH is good.. Temps a bit high throughout grow (27-32).. Should have plenty of nitrogen from nutes.. Drinks 2l every 2 days. This is start of week 8..
Thanks in advance for any illumination :D

 

[Bdubs]

You say it has plenty of nitrogen. I want to say the infamous calcium deficiency. Yellowing from bottom up, usually followed by browning from magnesium deficiency. But it seems if it is calcium you have plenty of magnesium or it is the very onset. If you notice your leaf stems or overall plant seems to be more weak/limp then calcium is most likely your culprit.

 

[Bdubs]

The calcium yellowing tends to skip up and go bottom-middle-top not affecting all the leafs on the way up. Whereas nitrogen deficiency will be selective leaves bottom up yellowing.

 

[757Botanist]

You say it has plenty of nitrogen. I want to say the infamous calcium deficiency. Yellowing from bottom up, usually followed by browning from magnesium deficiency. But it seems if it is calcium you have plenty of magnesium or it is the very onset. If you notice your leaf stems or overall plant seems to be more weak/limp then calcium is most likely your culprit.

EUREKA! My plant two out door babies are having the same issue. Am I to understand that Cal-mag can slow the yellowing down? Should I wait until
The soil is completely dry before I add?

 

[wollywonka]

Thanks for the swift reply @Bdubs! I'm using the same tap water that I've used all my grows.. Never had an issue and the water seems fine.. Has a ph of 8.3 that i need to correct, i guess this indicates calcium presence or am i wrong?
Otherwise i guess you're correct and i'll buy immediately a calmag solution!

 

[wollywonka]

Oh and i don't notice a particular "limpness"

 

[Bdubs]

The calcium demand is relevant to the amount of intensity of light the plant is seeing. To replenish and keep up with Chlorophyll production under high ppfd they need loads of calcium because calcium is required for chlorophyll. Run out of it and you can’t make it and green pigment fades.

So if you know you have plenty of nitrogen, giving lots of light, calcium is usually the deficiency.

 

[wollywonka]

The calcium demand is relevant to the amount of intensity of light the plant is seeing. To replenish and keep up with Chlorophyll production under high ppfd they need loads of calcium because calcium is required for chlorophyll. Run out of it and you can’t make it and green pigment fades.

So if you know you have plenty of nitrogen, giving lots of light, calcium is usually the deficiency.

Arigatou sensei!
First grow with TS1000, had a TS600 before! I'll buy it, and in the meantime lower the ppfd until it arrives!

 

[Bdubs]

Cell structure weakness is the progressive part of the deficiency. Calcium deficiency causes permanent damage to cells and even when you fix it, it doesn’t repair. It is immobile and cannot move freely around the plant.

 

[RootFarmer]

Notice that shade of yellow? Look a little like a banana peel? Yellowing from the tip/edges inward on older leaves indicates K deficiency. I suspect when you feed it K next they will turn a brilliant yellow and progressively turn a lighter yellow more like a N deficiency as the plant gets enough K. I don't see signs of excess N so probably not a lockout issue. A little K supplementation should stop it from continuing but some of those leaves won't recover.

 

[wollywonka]

I supplied calmag 1.2ml/l 2l without success...
So @RootFarmer you say it's potassium.. I feed biobizz nutes almost on schedule.. Should i add more BioBloom?
The photo is from today, noticeably yellower than yesterday

 

[wollywonka]

This is yesterday

 

[JohnBlazr]

up the nutrients you’re using and she’ll be happier. You said you’re using slightly less then schedule , some nutrient lines you need to use a lot. I remember growing with bio-canna , I was having to use 1/4 liter every feed.
It might not go back to the beautiful green you had in veg, but she’ll still grow buds, and smoke, good luck brotha , just up them nutes

 

[RootFarmer]

The added CalMag (specifically the N content)) could be the issue. If your N and K get out of balance you can get lockout. The N levels don't need to be to the point of toxicity (clawing/burn) to lock out K necessarily. I see some improvement in the green coloration. I assume you stopped adding the CalMag. If it was me, I'd give her a couple of feedings of just bloom then resume the regular feeding schedule.
I keep my N and K levels relatively equal up until about week 5-6 and then reduce my N and boost my K from there.

 

[JohnBlazr]

The added CalMag (specifically the N content)) could be the issue. If your N and K get out of balance you can get lockout. The N levels don't need to be to the point of toxicity (clawing/burn) to lock out K necessarily. I see some improvement in the green coloration. I assume you stopped adding the CalMag. If it was me, I'd give her a couple of feedings of just bloom then resume the regular feeding schedule.
I keep my N and K levels relatively equal up until about week 5-6 and then reduce my N and boost my K from there.

I had I similar issue before, calmag and silica built up salts , causing lockout. That’s what I suspected at least. I did exactly as you said, just bloom, and had good results. He said he’s feeding under schedule though with bio-bizz, that stuff is good but you need a lot of it.

 

[wollywonka]

The total calmag i added is 2.4ml and was an attempt after @Bdubs suggestion. So it isn't likely an excess issue. The yellowing goes on by about 2 weeks, this is day 3 after calmag.
today i feeded "lots" of k and the full schedule.. Will post the results in 2/3 days

 

[JohnBlazr]

The total calmag i added is 2.4ml and was an attempt after @Bdubs suggestion. So it isn't likely an excess issue. The yellowing goes on by about 2 weeks, this is day 3 after calmag.

Yea man, just feed heavily. They hungry.

 

[RootFarmer]

The total calmag i added is 2.4ml and was an attempt after @Bdubs suggestion. So it isn't likely an excess issue. The yellowing goes on by about 2 weeks, this is day 3 after calmag.
today i feeded "lots" of k and the full schedule.. Will post the results in 2/3 days

Yea I saw that. The nutrient/chlorophyll/light relationship with indoor grows is a Mg issue, not Ca so partially correct just the wrong nutrient. I don't believe that is the case here.
Looks like the plant is getting back in balance. It most likely was the added CalMag (N).

I haven't used BioBizz. As a general rule, I don't buy anything if I don't know what's in it.

 

[wollywonka]

Thanks for the info! Anyway, why do you say the plant is getting better? I see today a worse situation than yesterday and days before.. Maybe you inverted the pics?

 

[wollywonka]

This is today... I feel she's getting worse quicker. More yellow tips even on sugar leaves..
I'm considering a flush... Maybe too much nutes!