I run jacks ro water formula (12-4-16) in coco but always run into a deficiency around week 6 of flower. So I picked up the 7-15-30. Jacks states only using this finish formula for 1 week but I was wondering if I could use it for weeks 5 through 8 and clear water flush for a few days then harvest. Have anyone here used the finish formula with success?
Jacks 7-15-30 finish will solve my problem?
- Thread starter RCJR
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- jacks hydro jacks ro jacks321
rkymtnman
Well-Known Member
in what?
Wastei
Well-Known Member
It's probably nothing wrong with the nutrients it's the way you use it that has to change.
How much do you feed in EC and how often?
Coco
rkymtnman
Well-Known Member
no, deficiency in what nutrient(s)???
I'm following their nutrient schedule to a T. ph close to 6. Seed to week 6 in flower they are absolutely flawless. Around week 6 things start to go bad
Idk. The main fans turn yellow and crisp up brown and fall off.
Wastei
Well-Known Member
And that is grams per gallons or do you actually measure EC? Don't follow numbers from manufacturers. They want you to use as much of their product as possible.
rkymtnman
Well-Known Member
you gotta figure out your problem then. different nutes aren't going to solve it.
Ec
Same line of nutes, I never did the finish part on their schedule. Just ran the ro formula throughout. Have you checked out their grow schedules?
Ro formula is 2.1ec at ph 6
Wastei
Well-Known Member
That's way to hot if you don't have an optimal environment with CO2 enrichment, even then I think it's to high.
You're overfeeding causing lockouts. Do you check your runoff throughout the grow to see it ramp up and change?
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rkymtnman
Well-Known Member
if you can't identify what your deficiencies are , how do you know how to fix it/them?
Wastei
Well-Known Member
Burnt to bits by overfeeding and sub par watering practices. You can't treat Coco like a soil grown plant and expect good results.
Read up on how to grow in hydro and you will understand why you experience problems. You're feeding way to high EC and you're letting the medium dry out between waterings causing pH swings and spiking EC even higher between waterings.
Read up on how to grow in hydro and you will understand why you experience problems. You're feeding way to high EC and you're letting the medium dry out between waterings causing pH swings and spiking EC even higher between waterings.
watering 2 times a day with runoff. runoff is close to the same ec as input nutes. Medium never drys out.
Wastei
Well-Known Member
What does your runoff come out as? Optimally it should be 0.3 points over your input and same pH. Do you have them elevated and do you collect your runoff?
I currently feed 5x a day in coir at 1.2 EC. You have to monitor the plans output to know what they want. Start by feeding the same volume 2 times a day and wait til you have little to no runoff, then you increase volume and frequency according to plants response and size.
You're just simulating optimal watering practices and keeping track of the data. Without any data logging or monitoring you have nothing to work with to improve.
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I use jacks but I dont use their Recommended feed rates. I've used 3g/2g/1g for one strain but currently im running that ratio at 75% strength and they seem to be loving it. just got to learn those tweaks for light feeders.
Do you have any pics of what your experiencing? cause from what ive experienced it sounds like nutrient burn not deficiency.
Do you have any pics of what your experiencing? cause from what ive experienced it sounds like nutrient burn not deficiency.
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rkymtnman
Well-Known Member
where'd your pic go?