potassium deficiency perhaps?

[ms48130]

Problem: Leaf colors not right

Medium/grow method: Coco, washed & buffered

Feed: and supplements used: AN Ph Perfect Sensi Coco Grow A&B, Ph Perfect Sensi Coco Bloom A&B (1/2 Grow & 1/2 Bloom), B-52, Carboload, Sensizym, CalMag (1/2 Grow & 1/2 Bloom)

water source: R/O

Strain/age: JillyBeab Photo, week 5

light used: HLG 100 V2 & ViparSpectra XS1500 (just added this light)

Climate: Indoor tent




And an White Widow Auto in the tent is showing this, in case it helps...

 

[Mañ'O'Green]

Looks over-fed to me. What schedule are you following? What is the PH going in? Are you fertigating to 15%-20% run-off?

 

[ms48130]

Looks over-fed to me. What schedule are you following? What is the PH going in? Are you fertigating to 15%-20% run-off?

pH in is at 5.8, pretty much controlled by the AN pH Perfect base nutes.

For the feeding,
Sensi Coco Grow A & B @ 1ml/L
Sensi Coco Bloom A & B @ 0.5 ml/L
B-52 @ 1ml/L
Carboload @ 1ml/L
Sensizym @ 1ml/L
CalMag @ 1ml/L

Generally the nute mix PPM is about 500, original R/O water about 10 to start.

As to runoff, I usually get 30-40% runoff (I feed 2x daily). Usually my morning->evening feedings are about 10 hrs apart, and the evening->morning feeding is more like 14 hrs apart. I've recently observed that in the morning they take more water to get to runoff. Consequently I have tended to mix more for the evening feeding than I might need and my evening runoff is higher, I suspect due to the morning the girls being more thirsty. Since I've realized that discrepancy between morning & evening quantities, I can adjust for that, although I _thought_ it was pretty much impossible to overwater coco (unless by "over-fed" you mean the nutes are too heavy).

 

[ms48130]

A better view of one of the plants from this morning's feeding. FWIW this is the ONLY leaf that displays this condition so severely.



Calcium perhaps?

Maybe the AN coco nute base does not enough calmag in it. I've been supplementing "minimally"

 

[ms48130]

One more pic, from the same plant. Seems like darker leaves, _maybe_ a bit of downward claw or droop?

 

[Mañ'O'Green]

Too much Cal-mag can cause the same look and I think that is what you are doing. The AN Coco should have more than enough Cal-Mag on its own. The other thing is Carboload is not included in the AN feed calculator?

 

[ms48130]

Too much Cal-mag can cause the same look and I think that is what you are doing. The AN Coco should have more than enough Cal-Mag on its own. The other thing is Carboload is not included in the AN feed calculator?

View attachment 1230825

Too much CalMag - that makes sense. That, along with the Carboload, was tracking one of TaNg's schedules, I'll drop them both out and see how it goes.

Thanks for checking in!

 

[ms48130]

Just did a flush and fed 1/3 strength of the AN schedule (TaNg's was about 1/2) AND I dropped out the extra CalMag and Carboload. I'm also going to give it a break today (and not feed 2x today) and see if things improve.

 

[ms48130]

I did as @Mañ'O'Green suggested and it seems that issue (on that plant) cleared up nicely. However, here's a different plant's misbehavings in the same tent (this one's at about 7 weeks), and I _think_ once again it looks like Potassium deficiency. For sure, NO extra CalMag added so I know it's not that. However, I have shifted to AN Bloom nutes for this White Widow Auto, and just some lower leaves are looking like this:

s

 

[Mañ'O'Green]

@ms48130 Too much potassium looks just like not enough. Look at all of the salt build-up on the outside of your pot. That indicates to me you have a salt build up and need to flush. First rinse off the outside of the pot the best you can then do a nutrient flush with 50% strenght nutrients to 50% run-off PH 6.4.