What the f is going on
- Thread starter DustyDuke
- Start date
hotrodharley
Well-Known Member
What medium is it and what is your feeding routine? Water - type and hardness? Personally I wouldn’t foliar spray in flower but that’s just me. Absorption is limited anyway with spray.
icetech
Well-Known Member
Aren't you supposed to run coco at a much lower ph? i have been using 5.0...
P.S. strains can be so different to nutes it's nuts.. i have a Herer that has been a whiney little girl and a durban poison i could feed with gas and it would dance like it's at a party... really odd how they react so differently.
P.S. strains can be so different to nutes it's nuts.. i have a Herer that has been a whiney little girl and a durban poison i could feed with gas and it would dance like it's at a party... really odd how they react so differently.
Aussieaceae
Well-Known Member
Hi Dusty,
I'd check the waste, see how close it is to ph6.5 and 900ppm.
Ph6.5 might be a little high for hydro, but i don't think it's the cause tbh.
I'd check the waste, see how close it is to ph6.5 and 900ppm.
Ph6.5 might be a little high for hydro, but i don't think it's the cause tbh.
lukedaduke
Member
6.5 is too high of a pH, I would suggest 5.8-5.9, but try not to swing your pH to rapidly in flower as that can cause the plant to hermie.
That being said...
That looks like a calcium deficiency, makes sense that its happening in coco. If your not familiar check out some articles on the CEC of coco. In short coco holds on to sodium and potassium and will exchange that potassium with the calcium in your feed solution faster than the plants roots can pick it up. 200 ppm calcium in your feed will help to avoid this. Also, feeds high in potassium will aggravate a calcium deficiency because of the aforementioned CEC. This can also occur with very high nitrogen levels... and from what I can see from the other plants in the picture (dark green leaves with tip burn) your feed has too much nitrogen for the flowering stage. Your looking like 18 to 21 days into flower yeah?
Some strains are complete calcium hogs (pretty much all true kush plants are like this) and really need much more calcium when initiating flower, might explain why you are seeing the deficiency all of a sudden.
That being said...
That looks like a calcium deficiency, makes sense that its happening in coco. If your not familiar check out some articles on the CEC of coco. In short coco holds on to sodium and potassium and will exchange that potassium with the calcium in your feed solution faster than the plants roots can pick it up. 200 ppm calcium in your feed will help to avoid this. Also, feeds high in potassium will aggravate a calcium deficiency because of the aforementioned CEC. This can also occur with very high nitrogen levels... and from what I can see from the other plants in the picture (dark green leaves with tip burn) your feed has too much nitrogen for the flowering stage. Your looking like 18 to 21 days into flower yeah?
Some strains are complete calcium hogs (pretty much all true kush plants are like this) and really need much more calcium when initiating flower, might explain why you are seeing the deficiency all of a sudden.
Aussieaceae
Well-Known Member
That's what i'm worried about as well tbh. Not so much a deficiency, but a lockout. Might be salt buildup in the pot.
I think either way, checking the waste will likely be an indication of either.
JohnDee
Well-Known Member
Hi Icetech,
As you may have read above...5.8Ph seems to be the popu;ar coco number. But you feed at 5.0 with no issues? That is very intersting.
JD
DustyDuke
Well-Known Member
This is the brand I use I don’t actually use “calmag” I’ll give jacks ago on the next one cheers bro
icetech
Well-Known Member
Yeah.. they are only about 4 weeks old still pretty small but happy little plants. i don't know where i heard 5.0 for coco. but it's been working well..
icetech
Well-Known Member
If you get bored, gene was talking bout jacks+cal+mag for awhile in this live stream. it's what made me switch.. been super happy and the plants are doing better than when i used FF nutes+calmag
kiwipaulie
Well-Known Member
Stop checking your waste. Just worry about what you put in .
Aussieaceae
Well-Known Member
Why? Please elaborate.
kiwipaulie
Well-Known Member
You just keep flushing out nutrients and not getting a true reading. Just measure and adjust to the right pH when feeding and don't worry about it.
All you will end up doing is chasing your tail trying to correct a problem that's not there
Aussieaceae
Well-Known Member
I hear you.You just keep flushing out nutrients and not getting a true reading. Just measure and adjust to the right pH and don't worry about it.
My reasoning though, is the ec/ppms. If there's salt in the media we can tell, because the waste readings will be sky high. If the readings were close to 900ppm and ph6.5, i'd probably assume it's slightly over / underfed. Probably overfed, given the plant's smaller size compared to the others.
I'd check my waste well before i considered a flush of any sort, put it that way.
kiwipaulie
Well-Known Member
Personally I just think it's over thinking it. It's been years since I've run coco or soil. I switched to hydro years ago, as it's just so much easier.I hear you.
My reasoning though, is the ec/ppms. If there's salt in the media we can tell, because the waste readings will be sky high. If the readings were close to 900ppm and ph6.5, i'd probably assume it's slightly over / underfed. Probably overfed, given the plant's size compared to the others.
Aussieaceae
Well-Known Member
Saved my skin a couple times using poorly buffered coir. I do fully admit i usually wouldn't bother checking otherwise, not until something's wrong.
Lol funny that, I've gone the other direction. Just plain water every few days. No more ph'ing my water or ec.
Just gets so tedious measuring it all.
Each to his own, take it easy.
kiwipaulie
Well-Known Member
You too bro!Saved my skin a couple times using poorly buffered coir. I do fully admit i usually wouldn't bother checking otherwise, not until something's wrong.
Lol funny that, I've gone the other direction. Just plain water every few days. No more ph'ing my water or ec.
Just gets so tedious measuring it all.
Each to his own, take it easy.
Once you go rdwc or even dwc, you will never go back to a soil/coco medium.