First grow, all was excellent until week 7 of flower. Runoff / Soil PH questions

[cf_z]

Hi all,

First real grow. Plant was doing excellent until about a week ago. Flowers / sugar leafs overall still look great, but i assume i'm missing out on quality / quantity because of the current issue.

Info:
HLG 225 @ 160w, 17" above canopy (has not changed in many weeks prior to issue)
2x2x4' tent, temps 68-83*f at canopy level
Vegged for about 10 weeks, Began 12/12 on May 7 saw obvious pistols May 17.
Fox Farms Ocean Forest Soil, 3 gallon pot
Watering about every 3 days, almost a full gallon each time, little to no run off
No nutes until just before 12/12 flip, using FF trio at 1/3 the suggested rate every other watering
Water PH'd at as close to 6.5 as i could tell with my general hydroponics color tube, prior to nute addition (i figured small amount of nutes cant throw it off too far?)
All PH testing done with General Hydroponics droplets, no digital meters

Issue:
Larger fan leaves began yellowing about 1.5 weeks ago, got worse about 3 days ago, and worse again by end of day today after watering this morning with pure water.
I 'flushed' with a little bit of water when the issue first began, mostly just to test runoff PH. It landed at about 5.0
I tested the runoff again today, 5.0. It was PH'd higher than normal at like 7-7.5
I have a soil PH Meter that is registering at 7.0 (contrary to the run off drip test)

Questions:
Which do i believe? The soil probe meter or the runoff tested with the GH drip kit?
Do i flush it from here until my runoff reads appropriate, then re feed with correct nutes? (or where to i go from here)
Did i underfeed, considering i went 1/3 the FF reccomended and the plant, overall, seemed to be quite vibrant?
Am i just overthinking this and its not that uncommon for this in late flower?

Sorry for the lack of good photos of bad leaves, i was in a bit of a rush after work.
Thank you

 

[larrypizzimp93]

They actually look fine. Getting near the end of their life so they're gonna start dropping leaves. feed normally maybe drop a little from what you were doing. The big fan leaves are yellowing and the sugar leaves are still green. That's what you want

 

[SteakBags]

Hi all,

First real grow. Plant was doing excellent until about a week ago. Flowers / sugar leafs overall still look great, but i assume i'm missing out on quality / quantity because of the current issue.

Info:
HLG 225 @ 160w, 17" above canopy (has not changed in many weeks prior to issue)
2x2x4' tent, temps 68-83*f at canopy level
Vegged for about 10 weeks, Began 12/12 on May 7 saw obvious pistols May 17.
Fox Farms Ocean Forest Soil, 3 gallon pot
Watering about every 3 days, almost a full gallon each time, little to no run off
No nutes until just before 12/12 flip, using FF trio at 1/3 the suggested rate every other watering
Water PH'd at as close to 6.5 as i could tell with my general hydroponics color tube, prior to nute addition (i figured small amount of nutes cant throw it off too far?)
All PH testing done with General Hydroponics droplets, no digital meters

Issue:
Larger fan leaves began yellowing about 1.5 weeks ago, got worse about 3 days ago, and worse again by end of day today after watering this morning with pure water.
I 'flushed' with a little bit of water when the issue first began, mostly just to test runoff PH. It landed at about 5.0
I tested the runoff again today, 5.0. It was PH'd higher than normal at like 7-7.5
I have a soil PH Meter that is registering at 7.0 (contrary to the run off drip test)

Questions:
Which do i believe? The soil probe meter or the runoff tested with the GH drip kit?
Do i flush it from here until my runoff reads appropriate, then re feed with correct nutes? (or where to i go from here)
Did i underfeed, considering i went 1/3 the FF reccomended and the plant, overall, seemed to be quite vibrant?
Am i just overthinking this and its not that uncommon for this in late flower?

Sorry for the lack of good photos of bad leaves, i was in a bit of a rush after work.
Thank you

did you notice symptoms before starting the ff trio? or did you start the trio trying to prevent symptoms

going off the color of your ph test, I think you should add a little ph up it looks too orange

 

[cf_z]

They actually look fine. Getting near the end of their life so they're gonna start dropping leaves. feed normally maybe drop a little from what you were doing. The big fan leaves are yellowing and the sugar leaves are still green. That's what you want

Thank you for the reply. What’s your take on the runoff ph reading 2.0 lower than what’s going in?

did you notice symptoms before starting the ff trio? or did you start the trio trying to prevent symptoms

going off the color of your ph test, I think you should add a little ph up it looks too orange

No symptoms at all prior to or even weeks after starting the 1/3 ff dosage.
The photo of the bottle is the runoff. I have been using 7.0 to water it for the last couple of weeks and the runoff is still 5.0.
From my research it seems most think measuring runoff for soil is a fools errand but I’m still concerned.