Fan leaves turning yellow and dieing

[rwagner]

I'm not sure what's going on with my grow but the fan leaves are turning yellow and breaking. Any ideas?

 

[Justlovetogrow]

Clawing up some sort of nute lock out maybe heat ph process of elimination is key good luck getting on top of it though

 

[rwagner]

Clawing up some sort of nute lock out maybe heat ph process of elimination is key good luck getting on top of it though

How do I go about testing for nute lockout? We're using foxfarms grow big, big bloom and tiger bloom and half the recommended usage.

 

[Justlovetogrow]

Check your runoff ph and ec values to make sure your in the sweet zone I run coco so water to 20percent runoff every time it uses heaps of nutes but makes sure I have a stable ph and ec at the root zone where it really matters

 

[rwagner]

Check your runoff ph and ec values to make sure your in the sweet zone I run coco so water to 20percent runoff every time it uses heaps of nutes but makes sure I have a stable ph and ec at the root zone where it really matters

Please forgive my newbness. What does ec stand for?

 

[Justlovetogrow]

It’s electrical conductivity same as ppm just worded different.

 

[chinacat420]

How do I go about testing for nute lockout? We're using foxfarms grow big, big bloom and tiger bloom and half the recommended usage.

I’m kind of late to this party! I use the same FF as you, at half the recommendation. I have learned that with FF, you have to pH you water every time during flower. Repeat: EVERY TIME. It’s a PITA but you will see the results. I also check the pH of the runoff too (roughly every 7-10 days), and adjust the water accordingly. I also start adding cal-mag (1 tsp/gal as on label) every other watering (add after pHing water) when I flip to 12/12. Use the cal-mag by itself, do not add it to the FF nutes. Just an FYI: my water is rainwater or well water if rain barrel is empty or it’s winter.
I don’t remember who the farmer on this forum is, but he gave me the above info when I started having repeat issues during flower with my 2nd grow, and I was growing different strains than my first grow. He also recommended maintaining a soil pH range of 5.8-6.5 (5.5-7 at lowest/highest). Amazon sells the pH test kits as well as digital pH meters. I am most grateful to the unknown farmer for taking the time to help me out…my third grow looks awesome, thanks to him! Good luck, I hope this will help you with your next grow!