Plant yellowing in flower (w/pics)

I have a plant outside that's been flowering a few weeks now but lately has really started to yellow on the lower leafs. Initially I thought it was simply a little normal yellowing due to flowering, but the yellow has been spreading at a very fast rate lately. I'm worried that when the temperatures got into the 30s for a couple nights in a row the plant felt it must rush flowering and is now wasting all it's energy to try and finish what it has. That or a Nitrogen def but in flowering that would seem odd to me. So are there any ideas on why it may be yellowing like this and if it is from the cold if it will slow back down now that it's a bit warmer and properly finish the bud its got? Also as you can see the tips are curling down. I believe its due to over fertilization as I recently fertilized two waterings in a row by mistake. As always thanks for help and sorry for the photos resolution, all I have is a phone.








Soil is foxfarm ocean forest. Nutrient line is Blue Mountain Organics, and the PH of it all is currently unknown but was correct about 2 weeks ago and I'll retest again tonight.

Soil PH is about 7. I'll work on lowering it tonight with some aluminum sulfate if my local Lowes has it.

Well Since it is your lower leaves on your plant. In the flowering process your plant will get some yellow leaves... I dont see any bent up tips. So it is because it is flowering. Think of it like this. All of the Green is juice going to the buds.. And Leaving it without nothing.. You should clip those leaves off.

i agree.. i wouldnt be worried... i am flowering my girls right now and had one of them yellow top to bottom in a week... she is still holdin onto some of the leaves... but she doesnt have any green fan leaves.. only green is around the buds..

I'm sure that it's simply the transition from veg to flower. I started flowering my plant a couple days ago and a few leaves are yellowing slightly. No big deal, were growing buds not leaves.

Your plants look fine! try a flush with diluted nutrient solution! and since you are still in early flowering, add Nitrogen to your feeding regiment bud growth needs nitrogen( a small amount) till they later phase of flowering. at that point continue using your super bloom food. and don't forget to flush through the last few weeks. gook luck!

Alright, thanks a lot for the tips. Was worried because it seemed so early for flower yellowing but feeling pretty assured it's fine now.