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Possible Ca Deficiency while Flowering

Kinetic

Member
Space: 5x5x8 tent, good intake and circulation
System: Flood & Drain: 1.5h off, 15m on
Method: Rockwool & Hydroton
Light: Kind LED K5 XL1000
C02: 6-900ppm
Temp: 76-80F
RH: 55-60%
Nutrients: Technaflora flowering full dose, 1700ppm starting
Reservoir: 13gal initial, 71F, 5.8pH (controlled, pH UP), circulated and aerated, topped down with RO water daily. Fluctuates between 1600-2000ppm daily.
Additional information: Numbers rarely fluctuate beyond ranges given.

Hey guys. I am having this problem consistently where, maybe 3 weeks to a month into the flowering phase, I start getting signs of deficiencies on the newer growth. Nearly all lower growth looks very healthy.

It seems as though they need more of something in flowering that I haven't been able to provide with the standard Technaflora dosing chart. I usually add an extra 20% of MagiCal because, to me the problem presents as a calcium shortage.

I need a better understanding of what they are requiring in flowering that they are not in vegetative. It seems that even though I switch nutrient phases, there is still something lacking or in excess.

Most trichomes are clear, starting to turn cloudy, so I do not think it is the natural end of life cycle.

I think many people might say that I should switch to a more cannabis friendly nutrient mix like advanced nutrients. I may do that, but right now I have a lot invested in Technaflora and would like to figure out what I can do differently with it.

If it's a Ca problem, should I add even more MagiCal or should I create a foliar spray?

 
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