Wierd burn/crispy spots on leaves

[MJCanada]

Any chance you didn't properly rinse your coco before using it?

From what I read about coco, you can dump water through it continuously until the runoff matches ehat is goin in (both EC and PH)... hopefully someone with coco experience can chime in...

 

[Max888888100]

Flushed that one today with ~PH 5.9 water, guess that's still a bit high, but it's something. Finished with a weak solution of NPK 5-2-2, and a tiny pinch of calcium nitrate. Right now i'm only testing with that plant, it being the sickest.

There's obviously something wrong with the soil, runoff is always near 7 and won't drop. I was using the same exact label years back and it was top quality. Used up some of the leftovers from that time when i put my sprouts in solo cups. Second transplant was with the new stuff and a week later that one had spots on it, right now 5 plants are getting sick.

Got 2 stunted seedlings that are now growing and still in the cups. These give a 6.3 runoff, no problems there. Same soil, different year.

I got the clawing just like you my dude. Your humidity is good?

 

[w4kenb4ke]

I got the clawing just like you my dude. Your humidity is good?

It's in the low 40s with lights on, climbs up to 75 at night. I've got an exhaust pipe with a fan on 24/7. Temps never get above 30C

 

[shrxhky420]

I'm a little confused were you ph'ing your water our not? 1st post says tap water at 7 but always ph to 5.8-6.2
Then you say ph is 7.6?

You gotta be diligent with coco. Your plants will react quickly when something is off. Get your ph in order and keep some cal/mag handy.
Those 3 things seem to be the most common issues in coco... at least from what I've seen and experienced

SH420

 

[Roger A. Shrubber]

the quick fix for calcium
https://www.idealtruevalue.com/store/p/170711-VPG-Fertilome-16-OZ-Concentrate-Yield-Booster-Helps-Stop-Blossom-End-R.html?feed=Froogle&gclid=Cj0KCQiAmITRBRCSARIsAEOZmr680n8S2n0hHsDIKWxm5ikf10nUMaGzRgc7AkNLSDkWap3I1HT4ZtgaAt5AEALw_wcB

i use this every two weeks. i don't water with cal-mag, the fertilizer i use has a lot of sulfur and sufficient magnesium, (jack's citrus) and the calcium will bind with the sulfur and precipitate both out of the mix, not seen one calcium freckle since i started using it

 

[Max888888100]

I'm a little confused were you ph'ing your water our not? 1st post says tap water at 7 but always ph to 5.8-6.2
Then you say ph is 7.6?

You gotta be diligent with coco. Your plants will react quickly when something is off. Get your ph in order and keep some cal/mag handy.
Those 3 things seem to be the most common issues in coco... at least from what I've seen and experienced

SH420

The plants are turning around and healthy! Making a video/pictures tomorrow. There seems to be another poster with issues. Was trying to suggest for him to fix ph, just as you suggested. Surely that will help.

 

[Max888888100]

Dwc update:

All the plants (including coco) are looking fine

 

[Max888888100]

First bud hair possibly:


Possible light burn?