Potassium or Phosphorus or both Deficiency?

Hi, Newbie here, I got Auto Candy Cane, and she is at day 38 from seed. I just notice a few yellow leaves at the bottom. It looks like Nitrogen Deficiency, but I am not sure. I did some research and found most of the Nitrogen Deficiency happens at the vegetative phase, but I am at the flowering phase. I am just wondering if it could be Potassium or Phosphorus or both Deficiency .

I fed her 2ml CalMag, 2ml Mirco, 1ml Gro, 2ml Bloom with half tsp of Molasses on day 33, and PH between 6 - 6.5. And I gave her PH water on day 37

Here are some pics. All the input are appreciated. Thanks