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Moved over to coco from dwc

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Hiya, looking for some advice with my little friends… I’m on my first grow in 5yrs, I used to have a dwc system but this time I’m in coco.

I have a 4ft x 4ft grow area and I’m running a 600w(must be 8yrs old) hps in a cool tube with 4” extraction.

I don’t have an ec meter but I do have a reliable ppm meter

i am using all canna nutes coco AB, cal mag and pk 13 14

I currently have 4x Blueberry fast from         00 seeds in the tent and they’re 2wks and 2 days into flower sitting in 3gal fabric pots

Last feed into 5ltr was: 10ml A&B(each), 3ml cal mag and 4ml pk 13 14

my question is: how much pk should I be using at this time? And should I be reducing my A&B as the pk increases?

this strain was advertised as a 40-45 flowering period and the buds seem pretty far away from being done, ami prematurely worrying?

any advice would be greatly appreciated guys

may as well roll a spliff while I wait for your insightful advice 🤘🏻

Posted : May 26, 2023 7:36 pm
Stootie, twisted1, WoodI2 and 1 people reacted
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Posted by: @leafy

how much pk should I be using at this time? And should I be reducing my A&B as the pk increases?

Yer, around now is a good time to add the pk 13/14 mate. Try to keep the ppm the same as it was before you started adding pk. Add around 1 ml per litre of the pk, also add some cal/mag at whatever level you have been giving the plants. Then add a n b until the ppm is the same as it has been for the previous feeds. I hope you know what I mean and hope this helps. 

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Posted : May 26, 2023 7:48 pm
Stootie, brewer76, twisted1 and 2 people reacted
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cheers mate, yeah that makes sense, I know you’re an ec kinda guy but do you know roughly what range ppm I should be in around this time in flowering?, I’m currently at around 1450ppm

Posted : May 26, 2023 8:21 pm
Stootie, twisted1, WoodI2 and 1 people reacted
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@leafy, if you can recall your PPM reads from your DWC it will be very similar to the same numbers. Otherwise it sounds like your on the 700 PPM scale.

EC PPM Conversion chart

Well if you can convert whichever scale your in and for 2nd week of flower, My plants would be anywhere from EC-0.90 to 1.10, convert that and compare to where they're at on your scale. 1450 PPM seems very high whichever scale you use, but without seeing the entire plant and it's size it very herd to say. Hope this helps.


Posted : May 27, 2023 12:20 am
Stootie reacted

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