She looks to be doing the same as mine did.
Basicly shes getting old, slowly end of the road. As plant gets older during the flowering she might become more picky and thats why well balanced nutrition is the key success for long lasting autoflowers.
And as Felipe mentioned. Calcium is the worst in excessive amounts as it antagonises with many other macro and micronutrient.
Looks like its lacking K and Magnesium. And 1600ppm
- there is like 100% chance of excess of something.
I’d say if you want a longer lasting plant you could reduce your ppm. I’ve a feeling that continuous +1000ppm feed just kills the foliage before your buds are ripen.
I just had a PK boost week between 950-1100ppm and I sure did lose some leaves during that week. Now having a new reservoir mix at around 550-600ppm and the foliar symptoms subsided. …And buds still seem to ripen
Wish you the best of luck. And shes commin up nicely!