Help! Very low ph at runoff.

[BigN69]

I’m having an issue with low ph of runoff water. How do I fix? My first grow.

[Gingerbeard]

What is your pH going in?
What is your medium?
What are your nutes?
How old is your plant?

[Rootsruler]

My guess is he's in coco.....

[BigN69]

Plants have been on flower 12/12 since August 16. Medium is soil (happy frog). Nutes are Flora Trio (1/2 strength). Ph going in is 6.5.

[Gingerbeard]

What is it coming out and do you see any issues in your plants? If you are seeing any issues, give us a few pictures of the leaves and whole plant so we can better help. I'm imagining you might be seeing nutrient issues in your leaves?
Auto or feminized?

[OldManGrower]

When I grew in soil, I usually kept the ph at 6.8. We really do require a few pic as Gingerbeard requested. All of his questions are pertinent to your post.

[BigN69]

I hadn’t checked runoff because my coach said too much water. So I wasn’t watering to runoff. When I check it, I was at about ph 4.

[BigN69]

Hmm. Pics didn’t load?

[Gingerbeard]

Hmm... it happens. Try tomorrow.

[BigN69]

[BigN69]

Got some pics posted finally. Afghan Kush from clones. Leaves are light green to yellow. Not sure if this should be expected? Almost 5 weeks into flowering. Getting conflicting info locally.

[BigN69]

[BigN69]

Couple more pics.

[apacin0]

They look hungry. Half strength of bottle directions or nutrient schedule?

Here is the GWE Nutrient Schedule for GH Flora Trio.

https://www.growweedeasy.com/general-hydroponics-flora-trio-guide

[apacin0]

I'm guessing you meant the 1/2 strength bottle instructions, since that's basically what the GWE guide is.

[growmore15]

follow the schedule week to week. half strength is half what they need. you could probably push them much more than that. there are some GH formulas that have been around for decades that are better than what GH says to do. I might have some in an old email but that would date back to 2007

[Gingerbeard]

Yeah, hungry.
5 weeks in means you have another 3-5 to go? I've not grown AK but 8-10 weeks is a good window to consider for Kush.
This late on, if you are giving half strength nutes, your leaves will start doing the autumn color thing earlier rather than later or not at all because all the nutrients are getting sucked from them.
At this point, focus on the flowers. Your Happy Frog is pretty well depleted for the veg nutes it had at the beginning but that's okay because you don't need veg nutes.
About the pH. Whatever you have done up to this point has worked and I'm assuming you do not know how long your runoff has been 4.0 since you are just posting. My suggestion is to consider OldManGrower 's 6.8 but not worry if 6.5 is where your heart is at. They are otherwise fine looking plants.
Warning: The leaves are going to get ugly. Real ugly. Momma-don't-want-a-family-picture ugly. Go with it. It's the way things grow.