Mid-harvest yellowing climbing all the way up!

[Dr. Strange]

Hey everyone,

Still working on my first grow over here. Starting weeks 6 of flower today (out of 8-10 weeks). Yellowing leaves are climbing all the way up the plant and freaking me out. She is the biggest of the 4 I'm growing and the only one with yellowing leaves.

Grow info -
White Banners in Pro Mix HP (soilless) with Dyna Gro's Foliage Pro nutrients during veg. Dyna Gro's Bloom during flower (now) in a 4x4 grow tent with a 315w CMH light. Temps sit between 20-26 depending if lights are on or not, humidity stays between 40-50%. Watering is always pH between 5.6 and 6.1.

I was thinking possibly a nitrogen deficiency? Maybe got a nute lock out?

Let me know what you think and what you would do.

Thanks.

 

[UndyToke]

Might as well take the opportunity to start a final flush before harvest? Might be a bit early depending on how long the plant needs to flower. It seems more like a Potassium defficiency to me, since the yellowing is happening not only at the tip but is starting from the outside of the leaf on the edges, it would be the type of deficiency you could have at that time too.

I'm a new grower so take this with a grain of salt, but a nerd that studies a lot, and that's my thought so there you go

Good luck

this video might help you :

 

[Dr. Strange]

Might as well take the opportunity to start a final flush before harvest? Might be a bit early depending on how long the plant needs to flower. It seems more like a Potassium defficiency to me, since the yellowing is happening not only at the tip but is starting from the outside of the leaf on the edges, it would be the type of deficiency you could have at that time too.

I'm a new grower so take this with a grain of salt, but a nerd that studies a lot, and that's my thought so there you go

Good luck

this video might help you :

Thanks for the reply. Going to check that video out now, maybe you're onto something.