Stumped
- Thread starter bk78
- Start date
Renfro
Well-Known Member
This is the other thread I made about the issue
Medium pH Correction (Soil and Coco)
Checking and adjusting the pH of your root zone in soil or coco is a very important part of growing healthy plants. Often you will notice nutrient deficiencies despite the fact you know you have provided an ample feed at an appropriate pH level. When this happens it’s generally either...
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Renfro
Well-Known Member
TBH this was the biggest game changer for me in the last 20 years!
It showed me why I would have plants that went all fucked on me despite good input pH.
Thing is, lets say you wanna be a 6.0. but the coco is really at 4.5. You feed at 6.0 and since the first part of the drift down happens fast you are below your happy area really fast and diving back to the 4.5. So feeding high does two things. One it gets the root zone to swing down through the goldilocks zone between feeds so the plant shows immediate improvement, and two it gets the coco pH up a little from where it was.
I notice that when I stop feeding a little high the coco works it's way back down. So once I get the coco up to say 5.8 and I am feeding at say 6.2 and it's swinging back to 5.8, thats what I want.
dangledo
Well-Known Member
Plant Moisture Stress - Symptoms and Solutions
PLANT MOISTURE STRESS - symptoms and solutions (revised Jan. 12, 2009) Quite often I hear groans from folks having leaf problems -> “Help, my leaves are cupping and the leaf edges are turning brown!”, or, “My plant's leaf tips are curling down and turning black ....what's...
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Too much drying +heat can cause permanent ( cell damage) leaf roll
Had one recently start with the margins pointing up, forgetting i only pre-wet my promix, and hadn't given it a full watering well into bloom, going almost 10 days between watering. The leaves then the taco'd and never recovered. All while they continued on without much more damage
I've only had leaf margins effected in winter with low rh.
Just a thought
bk78
Well-Known Member
Thing about everything you just stated I have none of it. My room is fully automated and the temps and RH stay the same 24 hours a day. Hence why I’m stumped over this issue. I think @Renfro nailed it
25 Celsius with 50% humidity should be ideal imo. Always has been previously.
bk78
Well-Known Member
Dream crusher
rkymtnman
Well-Known Member
if i were to follow the VPD chart, i'd need to run at 58F if I remember correctly. lol
Renfro
Well-Known Member
I dunno, that would be one hell of a microclimate difference. Maybe check the differences?
dangledo
Well-Known Member
You mentioned something about needing 4x over the 3x you were previously using for feeding schedule
Then again I've only run coco in hempy.
I normally run promix while never adjusting the ph. As well as dwc. my leaf issues stopped in dwc when i cut out adjusting ph completely.
Could've been mentioned but a lot phos acid ( p source) can cause issues
2 cents
bk78
Well-Known Member
Huh? Are you too high or am I because I never understood that first sentence at allYou mentioned something about needing 4x over the 3x you were previously using for feeding schedule
Then again I've only run coco in hempy.
I normally run promix while never adjusting the ph. As well as dwc. my leaf issues stopped in dwc when i cut out adjusting ph completely.
Could've been mentioned but a lot phos acid ( p source) can cause issues
2 cents
bk78
Well-Known Member
Also have you ever just checked your ph since you stopped adjusting for it? If so what was it sitting at?You mentioned something about needing 4x over the 3x you were previously using for feeding schedule
Then again I've only run coco in hempy.
I normally run promix while never adjusting the ph. As well as dwc. my leaf issues stopped in dwc when i cut out adjusting ph completely.
Could've been mentioned but a lot phos acid ( p source) can cause issues
2 cents
dangledo
Well-Known Member
Lol it was pretty out of context. Dry periods between waterings. You said you went from 3x to 4x. Too dry maybe an issue at that point. It was in context to your first response to me.
Yes. Always in range when i cut back feed strength by half. 5.5 -6.2 with adequate runoff. Healthy flat solar panels
When i chased ph i either had ph burn/ stress or calcium def.
I realize coco is a whole other beast though with ph
bk78
Well-Known Member
Ok yeah that makes sense now haha. That could possibly be it causing a lock out maybe. I flushed them all really well today regardless and finished with a nice healthy feed so hopefully they get back on track in the next few days.Lol it was pretty out of context. Dry periods between waterings. You said you went from 3x to 4x. Too dry maybe an issue at that point. It was in context to your first response to me.
Yes. Always in range when i cut back feed strength by half. 5.5 -6.2 with adequate runoff. Healthy flat solar panels
When i chased ph i either had ph burn/ stress or calcium def.
I realize coco is a whole other beast though with ph
bk78
Well-Known Member
well I think you nailed it here. The ppm of this particular plant was super high. So my guess was it was drying out more then the others in between feedings so not getting the proper run off needed hence trapping all the salts in. I’ve upped the feeds to 2 minute intervals now. Irrigation can be great or it can also be your worst enemy.
bk78
Well-Known Member
Been there done that. Just more bro science imo.