Leaves burning

Your entire plant is light green. Nutrient issues have stages they go through that would help with diagnosis, many have very similar signs. This appears to be Nitrogen,, by now the lower leaves would be falling off if it was Magnesium. There could be several other issues adding to to magnitude. This should have taken a bit of time to form, she's been lacking and stressed for awhile. What are the TDS or EC of the runoff? What schedule have you been feeding her? This very well could be nutrient lock out also. The plant in your diary looks fine at week 5, shows normal signs of flowering. Make sure her living conditions are where they should be, I don't know what soil your using but the plant still needs all the basic nutrients her whole life, the amounts just change and even some boost products are used as you get further into flower. Good luck

Die hellen Punkte sind Mg Magnesium

Hey... Wie sieht es denn bei dir mit Magnesium aus. Waren die Blätter vorher schon gelb??? Oder fingen an von aussen nach innen gelb zu werden? Auf jeden Fall ne Lockout. Wenn se vorher schon nicht durchgehend grün waren, Magnesium halt, kann die Pflanzen zusätzliches Kalium und Phosphor sowie Stickstoff nicht verarbeiten. Wie sind deine Wasserwerte?

K-deficiency or something impeding K. All the damage is at the top, so did you also adjust your light for flower? Possibly too much? power is proportional to hours of operation (at same hanging height). if you gave 67% over 18h in vege you don't need more than 100% over 12 h

check ur Ca ppm its excess causes the lockout of N,P,K,Mg like ur plant has shown

Long term potassium deficiency. Remember..........what is showing in the leaves now, is a direct reflection of what was happening in the root zone 2-3 weeks ago.

Npk 3,5,7 are you adding any calcium or magnesium? Alot of pottasium without any calcium or magnesium could be skewing the ratio I'm not sure though. From the pictures it looks like lime green all over with primarily new growth effected but I can't tell from pictures due to shading to be sure. Leads me to think it's micronutrients or high pH, little dash of both.