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#1 Zephyr

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Posted 11 March 2017 - 12:04 PM

Hey all noticed my auto Colorado Cookies some leaves are yellowing she's on day 45 in coco been on ec 1.0 root stim, B52, and bloom a/b and ph down, been letting my ph drift between 5.8 and 6.2. Last night I gave em 0.8 as my ec out has been getting closer to what's been going in. I've not used any calmag this grow as last time I think it gave me some issues, and advanced nutes which I'm using reckon there's enough in their products. The 3 plants she's with are in flower but this cookies seems a bit slow. I'll give her a flush later b4 feed



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#2 mellowed

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Posted 11 March 2017 - 12:19 PM

Have ya calibrated ya ph meter recently mate?
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#3 Zephyr

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Posted 11 March 2017 - 02:38 PM

Have ya calibrated ya ph meter recently mate?


Not for a couple of weeks think I got about 2 snorts of buffer 7 left I'll give that a go
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#4 2scoops

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Posted 11 March 2017 - 03:26 PM

I`m not saying Advanced isn`t a top fert to use on weed growing section cus it is although it`s a bit pricey, but if i was you i`d be looking at some ferts that are made and tested in UK for our water like canna, growers ark or vitalink, i`m pretty sure that will cut out the defs in doing that, just my opinion that like. If your softwater ? trhen i`d possibly be adding 0.3ec cal/mag using those ferts irrelevant of what dribble it says on packet, remember coco hogs calcium and magnesium. I can`t see point in using b52 constantly through out your grow either Zephyr, maybe at stressfull times when you abuse them or say once a week, i much prefer superthrive myself though and i bet it`s a fraction the cost of that advanced stuff.


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#5 Budgie

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Posted 11 March 2017 - 03:30 PM

It's certainly looking like a Potassium (K) def and/or Zinc. I'm with them^^ Recalibrate your PH meter, and maybe give them a flush out to reset them again. :)


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#6 Zephyr

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Posted 12 March 2017 - 09:40 AM

It's certainly looking like a Potassium (K) def and/or Zinc. I'm with them^^ Recalibrate your PH meter, and maybe give them a flush out to reset them again. :)

 


Cheers Budgie I used up the last of me ph buffer 7 and my meter was out by 0.5 ish and gave the cookies a flush as she's the only one showing symptoms. See what happens after today's feed



 

I`m not saying Advanced isn`t a top fert to use on weed growing section cus it is although it`s a bit pricey, but if i was you i`d be looking at some ferts that are made and tested in UK for our water like canna, growers ark or vitalink, i`m pretty sure that will cut out the defs in doing that, just my opinion that like. If your softwater ? trhen i`d possibly be adding 0.3ec cal/mag using those ferts irrelevant of what dribble it says on packet, remember coco hogs calcium and magnesium. I can`t see point in using b52 constantly through out your grow either Zephyr, maybe at stressfull times when you abuse them or say once a week, i much prefer superthrive myself though and i bet it`s a fraction the cost of that advanced stuff.


Thanks Jimmi I'll have to do a bit of research on the nutes front, I had similar issues with a cookies last grow I am soft water think my base ec is 0.3 so last time used calmag a lot but have stayed away from it this grow (replaced it with b52 which I'll keep for a weekly treat from now on)
Hopefully cos my ph meter has been a bit out of kilter I should see some improvement but I have got some calmag I'll bung a bit in from 2moro
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#7 Zephyr

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Posted 12 March 2017 - 09:43 AM

Have ya calibrated ya ph meter recently mate?


Good call Mellowed I'm now out of ph buffer 7 but my meter is calibrated and was 0.5 out. Thanks m8
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#8 Budgie

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Posted 12 March 2017 - 10:01 AM

0.5 might not seem like much but it's a lot when it comes to PH. Looks like you've caught the trouble causer.

 

I'm sure that too much calcium locks out Pottasium as well @Zephyr, so maybe drop back a little on the amount of CalMag you are using.


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#9 Forest

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Posted 12 March 2017 - 01:32 PM

that low ec must be leading into some defs .

And I'd add cammag cos u said u r not using it right?
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#10 Tobys smoking a fatun

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Posted 16 March 2017 - 02:17 PM

Hey all noticed my auto Colorado Cookies some leaves are yellowing she's on day 45 in coco been on ec 1.0 root stim, B52, and bloom a/b and ph down, been letting my ph drift between 5.8 and 6.2. Last night I gave em 0.8 as my ec out has been getting closer to what's been going in. I've not used any calmag this grow as last time I think it gave me some issues, and advanced nutes which I'm using reckon there's enough in their products. The 3 plants she's with are in flower but this cookies seems a bit slow. I'll give her a flush later b4 feed



attachicon.gif20170311_111451.jpgattachicon.gif20170311_111503.jpgattachicon.gif20170311_111554.jpgattachicon.gif20170311_111541.jpgattachicon.gif20170311_111512.jpg

Thanks for looking

Hey mate, um cal mag? how come buddy? you only really need it if using r.o water or very low E.C water. or soft water. If you have hard water shouldnt be a problem at all really. so, good call dropping cal mag, its used regularly if you are using soiless mixes along with r.o water in hdro/coco...

 

so, 1.5 months of 1.0 ec made up of 3 products, hmmm time to flush with half strength nutes i reckon. Don't use just water as this can cause issues itself washing out those valuable exchange sites between root and medium. 

 

The leaf symptoms look alot like ph issues which when you have salt build up can affect the ph. 

 

Reset the ph with half strength nutes (assuming your back ground ec is around 0.4) i'd make it to around 0.6-0.7 E.c 3 times pot volume and run it through slowly to rid any build ups. Next feed go in with a 1.0 feed of just a and b nutes, drop the stim for now until shes back on track. If there is excess nutes in salt form comprising of mostly nitrogen from the grow feeds prior to bloom feeds, the nitrogen can hold flowering back some.

 

Strangely i'm feeling like you may have over fed that plant at some point during the veg stage


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