[marzig]

I wonder if it’s getting enough calmag. Everything I read on that coco stressed it needed high levels of calmag to reach full potential.

Do you know if it’s been pre-buffered?

[jmystro]

Actually it’s the opposite in this situation. Too much calcium can antagonize 7 different elements and that’s what’s going on here.

[ganja_gnome]

it is pre buffed and was showing signs of deficiency at week 3 then I started incorporating calmag. Shes only received 2 calmag feedings with the recommended dosage. ( used the foxfarm bushdoctor calmag)

[TheTrimReaper]

Not sure if it may have to do with the light but I’ve seen people going even lower on PPFD even in flower with autos. Also I’d personally be trying to raise the tent temps a little maybe even up to 80F until the last couple weeks before harvest especially if you’re running LED’s, although your VPD seems to be in a good range. Have you run into any watering issues?

[ganja_gnome]

No issues with the watering, she guzzles a gal every 2 days from the AC Infinity self wicking pots (butt chugging)with a top watering when shes empty and before filling her back up

[Thickems]

This, all light testing i have done with autos, they like low light. 350ppfd was healthiest range i found over a variety of genetics. This looks like light stress. Its all on areas closest to the light. To much can force metabolism and cause what looks like nutrient problems. Turn the light back like 30 or 40% would be my first step.

[TheTrimReaper]

Exactly what I was thinking the tops closest to the light seem to be the most affected, although the cal-mag issue everyone is talking seems like a contender too. I didn’t think about that because my grow style is different and normally don’t deal with that issue, but I would be starting with the light either way personally and going from there.

[ganja_gnome]

I’m gonna try this and lower the light intensity to 600 PPFD at first as the middle middle of the canopy looks green and receiving about 600 and pull back on the CALMAG.

[jmystro]

Cut out the ca-mg and it will recover. Too much is worse than not enough and this plant is telling you it has way too much available calcium that’s causing issues with other elements.

[ganja_gnome]

I’ll chill on the calmag and see how she progresses. The was showing signs of calmag deficiency at week 3 and have been giving her a reg dose once a week since. I’ll back off it and see if she gets better. thanks

[hollywoodmike]

Had this happen to my last cycle. I put too much calcium in soil mix. Oyster shell and gypsum. I stopped using calmag and just use Epsom salt.

[jmystro]

Never supplement calcium or magnesium unless the plant is actively showing a deficiency with either. There’s no such thing as a cal-mag issue. Shit, there’s no such thing as cal-mag. Calcium is Ca and magnesium is Mg. Marketing sells nonsense terminology like cal and mag. Being able to recognize what is a calcium or magnesium deficiency actually is and not some other issue like pH is important. Don’t be a more on.

[purp-terp-pheno-god]

That to me looks like you let it get too dry. Did this start right after a really dry period where it accidentally got too dry? I’m not a coco grower but I thought royal gold needed calmg

[ganja_gnome]

the coco never goes dry it bottom feeds from the ACI bottom wicking pots

[marzig]

IMO a proper amount of calmag should be constantly available in the water being supplied to the wicking pots, not as periodic additional top feedings. I think that as the grow dots are slowly releasing nutrients there should always be a constant amount of calcium and magnesium readily available. With autos in my autopots with coco, I always add calmag to my nutrient solution when adding to the reservoir.

[ganja_gnome]

putting calmag down there wont clog up those lines?

[marzig]

I only have my experience with autopots to go by and none with your system or grow dots. I put everything that my plants receive through the lines going to my autopots and have never had any issues.