Diagnose what is going on !?

[Timv]

To give a brief rundown as to what has happened.
- There was two days out of my flower cycle that the lights stayed on instead of shutting off the days were not consecutive. They happened about a week and a half apart.
- These plants started week six today and as you can see from the pictures, they seem to have halted in growth while two plants out of the whole room seem to not been affected
- Showing signs of yellow spotting/discoloration of the leaves.
- The room has also got to 86°F. I have now fixed that issue.
I am assuming that this will be hard to pinpoint because of all of the factors that play into them.
- I am running the Canna new line in Cocoa medium feeding currently at 1200 ppm pH 5.8 to 6.0 and making sure my feed temp is always between 66° to 70° give or take I always aim for 68°

 

[Ninjadogma]

Good day. At 2.4 EC you're probably dealing with an over, not an under. Do you check runoff to compare against input? It can tell you a lot about what's currently going on. If pH is drifting down it would account for the loss of magnesium, and if it's coming out between 5.8-6.1 excess calcium and potassium could be interfering with mag uptake. Try and aim for 900-1000ppm for your feedings at current age and you may want to flush it down from where it's currently sitting so nothing else is at risk of getting locked out.

The boo boo with the lights probably won't amount to anything other than some stress. You might see a couple rounded sugars that line up to about when it happened, and that's doubtful it will even amount to that.

Try to keep that tent temperature down. At 86° you're going to have a lot of terps gassing off. It's beyond the "boiling point" of your citrus, pine and fruity terps. You might have smelled them at certain points as temps went up and they gassed off.

All in all, I'm thinking you've just got a real mild lockout going on and minimal adjustments needed to get back on track.

 

[Timv]

Good day. At 2.4 EC you're probably dealing with an over, not an under. Do you check runoff to compare against input? It can tell you a lot about what's currently going on. If pH is drifting down it would account for the loss of magnesium, and if it's coming out between 5.8-6.1 excess calcium and potassium could be interfering with mag uptake. Try and aim for 900-1000ppm for your feedings at current age and you may want to flush it down from where it's currently sitting so nothing else is at risk of getting locked out.

The boo boo with the lights probably won't amount to anything other than some stress. You might see a couple rounded sugars that line up to about when it happened, and that's doubtful it will even amount to that.

Try to keep that tent temperature down. At 86° you're going to have a lot of terps gassing off. It's beyond the "boiling point" of your citrus, pine and fruity terps. You might have smelled them at certain points as temps went up and they gassed off.

All in all, I'm thinking you've just got a real mild lockout going on and minimal adjustments needed to get back on track.

I appreciate your reply, so I’ve definitely had a similar issue happen in the past that I have also decided was being a lockout. They definitely were way worse than what show right now. It seems to happen right when I start pumping in the pk 13/14. I did a 2 day water feed/flush I don’t have flood tables so I can’t do a complete flush however I did make sure to feed them PH’d water for two days straight a little bit more than my usual feed. What seems to baffle me is that two plants in here seem unaffected at all while all these other plants are super behind on growth.

 

[carlosescobar]

I appreciate your reply, so I’ve definitely had a similar issue happen in the past that I have also decided was being a lockout. They definitely were way worse than what show right now. It seems to happen right when I start pumping in the pk 13/14. I did a 2 day water feed/flush I don’t have flood tables so I can’t do a complete flush however I did make sure to feed them PH’d water for two days straight a little bit more than my usual feed. What seems to baffle me is that two plants in here seem unaffected at all while all these other plants are super behind on growth.

Ive thrown my P/K away . i lost 2 plants last year towards the end of the flower period because i added 2ml of PK13/14 , the leaves started burning and curling , (which i mistook for light/heat burn) so i moved my light up ...i had also been treating coco like soil so got a big build up towards the end which didnt help.
I was reading up on light leaks last week as my light came on for 1/2 hour on 2 days..apparently up to 15 minutes will not affect anything but over that and you might see a bit of stress. Also its worth remembering these plants will pause at various stages i think they pause halfway through flower