Can't figure it out

Hey all...
See the attached pics.... late veg and trying to get healthy before flipping. There is a long story on this grow as its my second run in RW and have had many struggles. Basically there are what appears to be deficiencies, which overall seemed that bumping the overall EC with some CalMag might correct. I have bumped the P & K by 100ppm...tried a 200ppm Epsom bump... Hand feeding daily with good dry backs.

So I'm just looking for some ideas on what you all may suggest to try!

Here are the current stats.

78 ambient
Leaf temp 75
72-75 RH
750 C02
Jacks 321 @ 2.6 (was initially running lower @ 1.2 and began boosting)
Going in @ 2.5 - 3 EC
Going in @ 5.8PH...runoff/in blocks fluctuate 5.6-6.4.

Thanks for the help!!

Your feed EC seems high to me. i would think they are locked out. I would flush those blocks out first, then go back to a lower feed. maybe lower than the 1.2 since it looks like your are still in Veg. you posted run off ph, flush one proper and check the run of EC as well.

Potassium deficiency and appears magnesium deficiency developing.

Thanks... the plants have been eating what they have been given for the most part, as the EC run off is only a bit higher than whats going in, unless I allow to dryback heavy.

I had a phone consult with the guy that wrote the EBook (crop steering book) for growlink. He top feeds in RW for years now, commercially, and told me my EC was way too low and they were starving. He says he goes in at 2.5 - 3 EC during veg no problem and about double that in flower! Yeah, I know...thats high! Soooo, having been running at 1.2-1.5 EC, and showing Def's...I bumped it based on his recommendation. Being new to RW, I have no experience with it.

I had done the flush and lowered EC strength to 1 before the consult, and the leaves were showing the same symptoms along with lighter green fans (low N) at .8-1.5 EC, ...with no improvement. So I then bumped the EC. I've treated for early root rot as well (H202, and hypochlorous) even though no real evidence of it ... J I C. So...that being said maybe the sweet spot I jumped over?

hotrodharley said:

Potassium deficiency and appears magnesium deficiency developing.

Click to expand...

Thanks...I thought the same and had bumped them...will bump more! Just figured at the EC I'm running it would have taken care of it. What kind of a ppm bump on K and Mag would you think?...another 100?

With an EC of 2.6, I doubt you have a deficiency.. More like a lockout..

Qsound said:

Thanks...I thought the same and had bumped them...will bump more! Just figured at the EC I'm running it would have taken care of it. What kind of a ppm bump on K and Mag would you think?...another 100?

Click to expand...

I agree with @HydoDan. You’re probably experiencing lockout.