56 days huh? A quick look at seedsman says these are 8.5 weeks from germination. I would give them a dose of LITFA for a week and harvest them.
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You have several weeks left so a kelp tea then normal feeding would be good. Being autoflower i am hesitant to tell you how much to feed.
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I might just LITFA for a couple of weeks, but i am gonna harvest them when them trichomes are mostly amber, i believe i have been getting not so potent weed because of my eagerness to harvest. This time i am waiting till the end. U know.
I dunno where to get kelp, that is not something readily available down here, might have to start collecting it when i go to the beach. The Sweet Seeds website says it should be ready in about 60 days, they all say the same but i dunno manā¦ Might have to start looking at the trichomes.
In fact gonna do it nowā¦ BRB!
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Banana ferment has a lot of potassium. You have several ferments right?
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I made a lot yes, but my little fridge for my experiments is down, soā¦ I lost them. I do have the FFJ made of flowering cannabis i made a few months ago, and has been in the fridge and all. But i dunno, i am only gonna do Awesome Blossoms which is 2-11-11 and Sugar Daddy which is 0-0-0 but has molasses, sugar cane and another thingā¦ To finish it.
I see some tricomes amber already, i want them at least 30% amber and all the rest cloudy.
HppHrvst
EDIT, and since they are close to finishing, gonna germinate some more. Maybe 3 Bears OG from Mephisto and do it in the 3 Bears OG thread there isā¦ YEAH!
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Autos are suprisingly fast. Usually one gets three weeks of veg, then they flower in another six weeks. A lot can happen in a week.
I find it hard to believe there is a deficiency with 2.2 EC. Perhaps something else is locking out K, but there is definitely K in there. Iām always up for a dose of kelp though, Iāll use that on the day of harvest. 
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Well, pH is exactly at 6.3. It shouldnāt be blocked or stagnant or nothingā¦ Hmmm.
EDIT, measured pH and itās actually at 6.8, but that is still good right?
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Thatās the pH you put in, what pH comes out? I would probably split the difference between my advice and @ryasco by giving them a light 1.0 EC feed with a good amount of run-off.
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Itās hempys bro. I drain the old nutes before putting in the new ones, every time. Actually no more nutes for these ladies, i am very close to harvest, trichomes are starting to turn. I dunno what i was expecting to run them foreverā¦ LOL
I put in 6.2pH and 6.8Ph comes out, the measurement i just took was from one of the buckets, i drained it a little and measured pH and then put that back in.
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I agree with @ReikoX. 2.2 is on the high side even for hydro, a good flush with lower nute strength around 1.2 might do the trick.
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These are my Alien Rift and Lemon Garlic OG x Starfighter, getting the same exact treatment. Only difference is the method, the AR and LGOGxSF are in Canna Coco, and the Dar Devil in coco husks.
I dunno what you guys thinkā¦
HppHrvst
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Hempy is still hydro, I would have been feeding at 5.5, the natural swing would have put your runoff somewhere around 6.2-6.5 in theory!
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I learned on here that plants need to be fed in the higher pH scale when going into flowering because they like more acidic at that stageā¦
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Yup you lock out Phosphorous, Boron & Manganese at that high a ph
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He would probably be ok in soil at that ph but not hydro.
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Will be draining the plants and gonna give them nutes at 50% strengh with 5.7 pH, right nowā¦
Will not be flushing tho.
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But your runoff at 6.8 says you could have started with a lower ph. Iirc hydro effective range is 5.5-6.2 with the optimum holy grail being 5.8
Still good looking plants and they are about done 
so things to play with next grow bro!
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Yeah right, will not flush them but will give them nutes with right pH. Gonna update in about 10 minutes.
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Wording?
Is that meant as an agreement or did you forget to italicizes that lol
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