What to do after flush? Nitrogen deficiency

AlexWarn81

Member
Strain: Royal Dwarf Auto
Ph Water: 6.5
Nutrients: 2ml/L Biobizz Grow, 1.5ml/L Bloom, 0.7ml/L CalMag
Soil: Biobizz Light mix
Pots: Fabric Pots 7L
One is 5 weeks old and the other one 6 weeks.

Hi, Ive been battling what I suppose is a nitrogen deficiency for a couple of weeks now. In the beginning I only had some yellow leaf tips but now my leaves at the bottom are dying off on after another. My plants are in early flower so I think theyre still to young to be cannibalizing leaves like that. After 2 weeks of contemplating because I was scared to stunt their growth, I flushed my plants yesterday with about 20L of 6.3-6.5ph water, since I suspect the Nitrogen deficiency is because of a lockout.

I just want to know what the smartest way to proceed would be.
How much nutrients should I give? Ive been giving them only half of what the nutrient schedule advises. I also didnt give them any nutrients when I flushed.
I will attach some pictures of the affected leaves.
I think the brown spots are from a calcium deficiency I was having in the beginning of my grow, It seemed to have disappeared since I gave them CalMag but now its coming back and I dont understand why. The brown spots also are only on the lower leaves that have the yellowing.
This is my first grow and now I have tried pretty much everything I found in online tutorials, I dont know what to do at this point. I also feel like my older plant (or both) is a bit behind on bud production, what do you think?

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